IEC 60335-2-12:2002

IEC 60335-2-12 ®
Edition 5.2 2017-10
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
colour
inside
Household and similar electrical appliances – Safety –
Part 2-12: Particular requirements for warming plates and similar appliances

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IEC 60335-2-12 ®
Edition 5.2 2017-10
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
colour
inside
Household and similar electrical appliances – Safety –

Part 2-12: Particular requirements for warming plates and similar appliances

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 13.120; 97.040.50 ISBN 978-2-8322-7684-6

IEC 60335-2-12 ®
Edition 5.2 2017-10
CONSOLIDATED VERSION
REDLINE VERSION
colour
inside
Household and similar electrical appliances – Safety –
Part 2-12: Particular requirements for warming plates and similar appliances

– 2 – IEC 60335-2-12:2002+AMD1:2008
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CONTENTS
FOREWORD . 3
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 8
3 Definitions . 8
4 General requirement . 8
5 General conditions for the tests . 8
6 Classification . 8
7 Marking and instructions . 8
8 Protection against access to live parts . 9
9 Starting of motor-operated appliances . 10
10 Power input and current . 10
11 Heating . 10
12 Void. 11
13 Leakage current and electric strength at operating temperature . 11
14 Transient overvoltages . 11
15 Moisture resistance . 12
16 Leakage current and electric strength . 12
17 Overload protection of transformers and associated circuits . 12
18 Endurance . 13
19 Abnormal operation . 13
20 Stability and mechanical hazards . 13
21 Mechanical strength . 13
22 Construction . 14
23 Internal wiring . 14
24 Components . 14
25 Supply connection and external flexible cords . 14
26 Terminals for external conductors . 15
27 Provision for earthing . 15
28 Screws and connections . 15
29 Clearances, creepage distances and solid insulation . 15
30 Resistance to heat and fire . 15
31 Resistance to rusting . 15
32 Radiation, toxicity and similar hazards . 15
Annexes . 16
Bibliography . 16

Figure 101 – Probe for measuring surface temperatures . 15
Table 101 – Maximum temperature rises of external accessible surfaces under normal
operating conditions. 11

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INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
SAFETY –
Part 2-12: Particular requirements for warming plates
and similar appliances
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
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with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
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Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
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4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
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between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
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expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
This consolidated version of the official IEC Standard and its amendments has been prepared
for user convenience.
IEC 60335-2-12 edition 5.2 contains the fifth edition (2002-10) [documents 61/2232/FDIS and
61/2307/RVD], its amendment 1 (2008-04) [documents 61/3541/FDIS and 61/3595/RVD] and its
amendment 2 (2017-10) [documents 61/5313/CDV and 61/5434A/RVC].
In this Redline version, a vertical line in the margin shows where the technical content is
modified by amendments 1 and 2. Additions are in green text, deletions are in strikethrough red
text. A separate Final version with all changes accepted is available in this publication.

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This part of International Standard IEC 60335 has been prepared by IEC technical committee
61: Safety of household and similar electrical appliances.
This fifth edition constitutes a technical revision.
This part 2 is to be used in conjunction with the latest edition of IEC 60335-1 and its
amendments. It was established on the basis of the fourth edition (2001) of that standard.
NOTE 1 When “Part 1” is mentioned in this standard, it refers to IEC 60335-1.
This part 2 supplements or modifies the corresponding clauses in IEC 60335-1, so as
to convert that publication into the IEC standard: Safety requirements for electric warming
plates and similar appliances.
When a particular subclause of Part 1 is not mentioned in this part 2, that subclause applies
as far as is reasonable. When this standard states “addition”, “modification” or “replacement”,
the relevant text in Part 1 is to be adapted accordingly.
NOTE 2 The following numbering system is used:
– subclauses, tables and figures that are numbered starting from 101 are additional to those in Part 1;
– unless notes are in a new subclause or involve notes in Part 1, they are numbered starting from 101, including
those in a replaced clause or subclause;
– additional annexes are lettered AA, BB, etc.
NOTE 3 The following print types are used:
– requirements: in roman type;
– test specifications: in italic type;
– notes: in small roman type.
Words in bold in the text are defined in Clause 3. When a definition concerns an adjective, the adjective and the
associated noun are also in bold.
The following differences exist in the countries indicated below.
– 7.12: The indication concerning appliances with a connector incorporating a thermostat is to be marked on
the appliance (USA).
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The committee has decided that the contents of the base publication and its amendments will
remain unchanged until the stability date indicated on the IEC web site under
"http://webstore.iec.ch" in the data related to the specific publication. At this date, the
publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
NOTE 4 The attention of National Committees is drawn to the fact that equipment manufacturers and testing
organizations may need a transitional period following publication of a new, amended or revised IEC publication in
which to make products in accordance with the new requirements and to equip themselves for conducting new or
revised tests.
It is the recommendation of the committee that the content of this publication be adopted for implementation
nationally not earlier than 12 months or later than 36 months from the date of publication.

A bilingual version of this publication may be issued at a later date.

IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct
understanding of its contents. Users should therefore print this document using a
colour printer.
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INTRODUCTION
It has been assumed in the drafting of this International Standard that the execution of its
provisions is entrusted to appropriately qualified and experienced persons.
This standard recognizes the internationally accepted level of protection against hazards such
as electrical, mechanical, thermal, fire and radiation of appliances when operated as in
normal use taking into account the manufacturer's instructions. It also covers abnormal
situations that can be expected in practice and takes into account the way in which
electromagnetic phenomena can affect the safe operation of appliances.
This standard takes into account the requirements of IEC 60364 as far as possible so that
there is compatibility with the wiring rules when the appliance is connected to the supply
mains. However, national wiring rules may differ.
If an appliance within the scope of this standard also incorporates functions that are covered
by another part 2 of IEC 60335, the relevant part 2 is applied to each function separately, as
far as is reasonable. If applicable, the influence of one function on the other is taken into
account.
When a part 2 standard does not include additional requirements to cover hazards dealt with
in Part 1, Part 1 applies.
NOTE 1 This means that the technical committees responsible for the part 2 standards have determined that it is
not necessary to specify particular requirements for the appliance in question over and above the general
requirements.
This standard is a product family standard dealing with the safety of appliances and takes
precedence over horizontal and generic standards covering the same subject.
NOTE 2 Horizontal and generic standards covering a hazard are not applicable since they have been taken into
consideration when developing the general and particular requirements for the IEC 60335 series of standards. For
example, in the case of temperature requirements for surfaces on many appliances, generic standards, such as
ISO 13732-1 for hot surfaces, are not applicable in addition to Part 1 or part 2 standards
An appliance that complies with the text of this standard will not necessarily be considered to
comply with the safety principles of the standard if, when examined and tested, it is found to
have other features that impair the level of safety covered by these requirements.
An appliance employing materials or having forms of construction differing from those detailed
in the requirements of this standard may be examined and tested according to the intent of
the requirements and, if found to be substantially equivalent, may be considered to comply
with the standard.
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HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
SAFETY –
Part 2-12: Particular requirements for warming plates
and similar appliances
1 Scope
This clause of Part 1 is replaced by the following.
This International Standard deals with the safety of electric warming plates, warming trays
and similar appliances intended to keep food or vessels warm, for household and similar
purposes, their rated voltage being not more than 250 V.
Appliances not intended for normal household use but that nevertheless may be a source of
danger to the public, such as appliances intended to be used by laymen in shops, in light
industry and on farms, are also within the scope of this standard.
Appliances intended for normal household and similar use and that may also be used by
laymen in shops, in light industry and on farms are within the scope of this standard.
However, if the appliance is intended to be used professionally to keep vessels warm or to
process food for commercial consumption, the appliance is not considered to be for
household and similar use only.
As far as is practicable, this standard deals with the common hazards presented by
appliances that are encountered by all persons in and around the home. However, in general,
it does not take into account
– the use of appliances by young children or infirm persons without supervision;
– playing with the appliance by young children.
– persons (including children) whose
• physical, sensory or mental capabilities; or
• lack of experience and knowledge
prevents them from using the appliance safely without supervision or instruction;
– children playing with the appliance.
NOTE 101 Attention is drawn to the fact that
– for appliances intended to be used in vehicles or on board ships or in aircraft, additional requirements may be
necessary;
– in many countries additional requirements are specified by the national health authorities, the national
authorities responsible for the protection of labour and similar authorities.
NOTE 102 This standard does not apply to
– appliances made of flexible material, such as textile material;
– appliances intended exclusively to be used in locations where special conditions prevail, such as the presence
of a corrosive or explosive atmosphere (dust, vapour or gas);
– appliances intended exclusively for commercial catering or industrial purposes.

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2 Normative references
This clause of Part 1 is applicable except as follows.
Addition:
IEC 60584-1, Thermocouples – Part 1: EMF specifications and tolerances
3 Definitions
This clause of Part 1 is applicable except as follows.
3.1.9 Replacement:
normal operation
operation of the appliance under the following conditions
The appliance is operated with a shallow pan, 150 mm in diameter and filled with water to a
height of at least 25 mm, placed on the heated surface. If vessels are supplied with the
appliance, or specified in the instructions, these are used instead.
The appliance is operated without a pan if this condition is more unfavourable.
3.6.101
hot functional surface
surface that is intentionally heated by an internal heat source and that has to be hot to carry
out the intended function of the appliance
4 General requirement
This clause of Part 1 is applicable.
5 General conditions for the tests
This clause of Part 1 is applicable except as follows.
5.2 Addition:
NOTE 101 If the test of 15.101 has to be carried out, three additional samples are required.
6 Classification
This clause of Part 1 is applicable.
7 Marking and instructions
This clause of Part 1 is applicable except as follows.
7.1 Addition:
Appliances intended to be partially immersed in water for cleaning shall be marked with the
maximum level of immersion and with the substance of the following:
Do not immerse beyond this level.
When the provisions of footnote b to Table 101 apply, the appliance shall be marked with:

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– the substance of “CAUTION: Hot surface”, or
– symbol IEC 60417-5041 (2002-10).
7.6 Addition:
[symbol IEC 60417-5041 (2002-10)] caution, hot surface

7.12 Addition:
The instructions shall include the substance of the following:
This appliance is intended to be used in household and similar applications such as:
– staff kitchen areas in shops, offices and other working environments;
– farm houses;
– by clients in hotels, motels and other residential type environments;
– bed and breakfast type environments.
NOTE 101 If the manufacturer wants to limit the use of the appliance to less than the above, this has to be
clearly stated in the instructions.
The instructions for appliances incorporating an appliance inlet, and intended to be partially or
completely immersed in water for cleaning, shall state that the connector must be removed
before the appliance is cleaned and that the appliance inlet must be dried before the
appliance is used again.
The instructions for appliances intended to be used with a connector incorporating a
thermostat shall state that only the appropriate connector must be used.
The instructions for appliances having surfaces of glass-ceramic or similar material that forms
part of the enclosure of live parts shall include the substance of the following:
WARNING: Do not use the appliance if the surface is cracked.
The instructions for appliances that have to be used with particular vessels that are not
supplied shall specify the vessels to be used.
If symbol IEC 60417-5041 (2002-10) is marked on appliances, its meaning shall be explained
and location of areas where the limits are exceeded shall be stated or shown by a drawing.
7.14 Addition:
The height of the triangle in symbol IEC 60417-5041 (2002-10) shall be at least 10 mm.
Compliance is checked by measurement.
7.15 Addition:
The marking specified for hot surfaces shall be clearly visible when the appliance is operated
as in normal use, including when actuating any switch, adjusting any control or opening a lid
or door. It shall not be placed on a hot functional surface or on surfaces that are exempted
from the limits of Table 101.
8 Protection against access to live parts
This clause of Part 1 is applicable.

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9 Starting of motor-operated appliances
This clause of Part 1 is not applicable.
10 Power input and current
This clause of Part 1 is applicable.
11 Heating
This clause of Part 1 is applicable except as follows.
11.2 Modification:
Portable appliances are placed away from the walls of the test corner.
11.3 Addition:
Where the external accessible surfaces are suitably flat and access permits, then the test
probe of Figure 101 is used to measure the temperature rises of external accessible
surfaces specified in Table 101. The probe is applied with a force of 4 N ± 1 N to the surface
in such a way that the best possible contact between the probe and the surface is ensured.
The measurement is performed after a contact period of 30 s.
The probe may be held in place using a laboratory stand clamp or similar device. Any
measuring instrument giving the same results as the probe may be used.
11.7 Replacement:
Appliances are operated until steady conditions are established.
11.8 Addition:
When an appliance connector incorporates a thermostat, the temperature rise limit for the
pins of the inlet does not apply.
Addition:
During the test, the temperature rises are monitored continuously and shall not exceed the
values shown in Table 101.
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Table 101 – Maximum temperature rises of external accessible surfaces
under normal operating conditions
a
Temperature rise of external accessible surfaces
K
Surface
Appliances and parts situated not Appliances and parts situated
more than 850 mm above the floor more than 850 mm above the

b b
after installation floor after installation
Bare metal 38 42
c 42 49
Coated metal
51 56
Glass and ceramic
58 62
Plastic and plastic coating > 0,4 mm
d, e
a
The following surfaces or elements shall not be taken into consideration:
– hot functional surfaces;
– handles or control knobs including keypads, keyboards and the like: part of the equipment that a user
needs to touch to operate or adjust the equipment. The equipment has to be installed according to the
manufacturer’s instructions;
– surfaces within 5 mm of touch controls regardless of their shape;
– surfaces within 25 mm of the outline of the hot functional surfaces;
– underside surfaces that are not accessible to a 75 mm diameter probe having a hemispherical end;
– lids and covers.
b
When the required values are not met, the maximum temperature rise shall not be higher than two times the
values indicated.
c
Metal is considered coated when a coating having a minimum thickness of 90 µm made by enamel, powder or
non-substantially plastic coating is used.

d
The temperature rise limit of plastic also applies for plastic material having a metal finish of thickness less
than 0,1 mm.
e
When the thickness of the plastic coating does not exceed 0,4 mm, the temperature rise limits of the coated
metal or of glass and ceramic material apply.

12 Void
13 Leakage current and electric strength at operating temperature
This clause of Part 1 is applicable except as follows.
13.2 Modification:
For appliances that are intended to be used with particular metallic vessels, the vessels are
placed on the heated surface and connected to accessible metal parts. The metal foil is not
in contact with the heated surface.
For other appliances, vessels are not placed on the heated surface, the metal foil being in
contact with accessible surfaces of insulating material.
14 Transient overvoltages
This clause of Part 1 is applicable.

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15 Moisture resistance
This clause of Part 1 is applicable except as follows.
15.2 Addition:
Appliances without containers are tested with 0,01 l of saline solution for each 100 cm² of the
heated surface. The solution is poured steadily over the surface over a period of 1 min.
NOTE 101 Appliances that can only be used for warming crockery are not subjected to this test.
15.101 Appliances intended to be partially or completely immersed in water for cleaning
shall have adequate protection against the effects of immersion.
Compliance is checked by the following tests, which are carried out on three additional
appliances.
The appliances are operated under normal operation at 1,15 times rated power input, until
the thermostat operates for the first time. Appliances without a thermostat are operated until
steady conditions are established. The appliances are disconnected from the supply, any
appliance connector being withdrawn. They are then completely immersed in water
containing approximately 1 % NaCl and having a temperature between 10 °C and 25 °C,
unless they are marked with the maximum level of immersion, in which case they are
immersed 50 mm deeper than this level.
After 1 h, the appliances are removed from the saline solution, dried and subjected to the
leakage current test of 16.2.
NOTE Care is to be taken to ensure that all moisture is removed from the insulation around the pins of appliance
inlets.
This test is carried out four more times, after which the appliances shall withstand the electric
strength test of 16.3, the voltage being as specified in Table 4.
The appliance having the highest leakage current after the fifth immersion is dismantled and
inspection shall show that there is no trace of liquid on insulation that could result in a
reduction of clearances and creepage distances below the values specified in Clause 29.
The remaining two appliances are operated under normal operation at 1,15 times rated
power input for 240 h. After this period, the appliances are disconnected from the supply
and immersed again for 1 h. They are then dried and subjected to the electric strength test of
16.3, the voltage being as specified in Table 4.
Inspection shall show that there is no trace of liquid on insulation that could result in a
reduction of clearances and creepage distances below the values specified in Clause 29.
16 Leakage current and electric strength
This clause of Part 1 is applicable.
17 Overload protection of transformers and associated circuits
This clause of Part 1 is applicable.

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18 Endurance
This clause of Part 1 is not applicable.
19 Abnormal operation
This clause of Part 1 is applicable except as follows.
19.1 Modification:
Instead of being subjected to the tests of 19.2 and 19.3, appliances are subjected to the test
of 19.101.
19.101 The appliance is operated at rated power input with the heated surface completely
covered with felt strips for 7 h.
The felt strips have a width of 100 mm and are lined with a single layer of textile material. The
felt has a specific mass of 4 kg/m² ± 0,4 kg/m² and a thickness of approximately 25 mm. The
textile material consists of pre-washed double-hemmed cotton sheet having a mass between
140 g/m² and 175 g/m² in the dry condition.
If a thermostat operates, the test is repeated with the one-third of the heated surface furthest
from the temperature-sensing element covered.
20 Stability and mechanical hazards
This clause of Part 1 is applicable.
21 Mechanical strength
This clause of Part 1 is applicable except as follows.
Addition:
For appliances having surfaces of glass-ceramic or similar material that forms part of the
enclosure of live parts, three blows having an impact energy of 0,70 J are also applied to
parts of such surfaces that are not exposed to impacts during the test of 21.101.
21.101 Appliances having surfaces of glass-ceramic or similar material that forms part of the
enclosure of live parts, shall withstand the stresses liable to occur in normal use.
Compliance is checked by the following test.
A vessel with its base horizontal is dropped from a height of 150 mm onto the surface. The
vessel has a copper or aluminium base that is flat over a diameter of 120 mm ± 10 mm, its
edges being rounded with a radius of at least 10 mm. It is uniformly filled with at least 1,3 kg
of sand or shot so that the total mass is 1,80 kg ± 0,01 kg. The vessel is dropped 10 times.
The appliance is then supplied at rated voltage and operated until steady conditions are
established. A wet pad having dimensions approximately 100 mm x 100 mm is then applied to
the most unfavourable part of the surface. The pad is formed from a cotton sheet
400 mm x 400 mm having a mass between 140 g/m² and 175 g/m² in the dry condition. The
sheet is folded four times to form the pad, which is then soaked with water containing
approximately 1 % NaCl.
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The surface shall not be broken and the appliance shall withstand the leakage current test of
16.2.
22 Construction
This clause of Part 1 is applicable except as follows.
22.101 Portable appliances shall not have openings on the underside that would allow
small items to penetrate and touch live parts.
Compliance is checked by inspection and by measuring the distance between the supporting
surface and live parts through openings. This distance shall be at least 6 mm. However, if the
appliance is fitted with legs, this distance is increased to 10 mm if the appliance is intended to
stand on the table and to 20 mm if it is intended to stand on the floor.
23 Internal wiring
This clause of Part 1 is applicable.
24 Components
This clause of Part 1 is applicable except as follows.
24.1.5 Addition:
For appliance couplers incorporating thermostats, thermal cut-outs or fuses in the
connector, IEC 60320-1 is applicable except that
– the earthing contact of the connector is allowed to be accessible, provided that this
contact is not likely to be gripped during insertion or withdrawal of the connector;
– the temperature required for the test of Clause 18 is that measured on the pins of the
appliance inlet during the heating test of Clause 11 of this standard;
– the breaking-capacity test of Clause 19 is carried out using the inlet of the appliance;
– the temperature rise of current-carrying parts specified in Clause 21 is not determined.
NOTE 101 Thermal controls are not allowed in connectors complying with the standard sheets of IEC 60320-1.
25 Supply connection and external flexible cords
This clause of Part 1 is applicable except as follows.
25.1 Addition:
Appliances incorporating an appliance inlet that does not comply with the standard sheets of
IEC 60320-1 shall be supplied with a cord set.
25.7 Addition:
Light polyvinyl chloride sheathed cord (code designation 60227 IEC 52) is allowed,
irrespective of the mass of the appliance.

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26 Terminals for external conductors
This clause of Part 1 is applicable.
27 Provision for earthing
This clause of Part 1 is applicable.
28 Screws and connections
This clause of Part 1 is applicable.
29 Clearances, creepage distances and solid insulation
This clause of Part 1 is applicable.
30 Resistance to heat and fire
This clause of Part 1 is applicable except as follows.
30.2.2 Not applicable.
31 Resistance to rusting
This clause of Part 1 is applicable.
32 Radiation, toxicity and similar hazards
This clause of Part 1 is applicable.
B
A
E
C
D
IEC
Key
A adhesive
B thermocouple wires 0,3 mm diameter according to IEC 60584-1 Type K (chrome alumel)
C handle arrangement permitting a contact force of 4 N ± 1 N
D polycarbonate tube: inside diameter 3 mm, outside diameter 5 mm
E tinned copper disc: 5 mm diameter, 0,5 mm thick with flat contact face
Figure 101 – Probe for measuring surface temperatures

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Annexes
The annexes of Part 1 are applicable.

Bibliography
The bibliography of Part 1 is applicable.

––––––––––––
IEC 60335-2-12 ®
Edition 5.2 2017-10
CONSOLIDATED VERSION
FINAL VERSION
Household and similar electrical appliances – Safety –
Part 2-12: Particular requirements for warming plates and similar appliances

– 2 – IEC 60335-2-12:2002+AMD1:2008
+AMD2:2017 CSV © IEC 2017
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Definitions . 6
4 General requirement . 7
5 General conditions for the tests . 7
6 Classification . 7
7 Marking and instructions . 7
8 Protection against access to live parts . 8
9 Starting of motor-operated appliances . 8
10 Power input and current . 8
11 Heating . 8
12 Void. 10
13 Leakage current and electric strength at operating temperature . 10
14 Transient overvoltages . 10
15 Moisture resistance . 11
16 Leakage current and electric strength . 11
17 Overload protection of transformers and associated circuits . 11
18 Endurance . 12
19 Abnormal operation . 12
20 Stability and mechanical hazards . 12
21 Mechanical strength . 12
22 Construction . 13
23 Internal wiring . 13
24 Components . 13
25 Supply connection and external flexible cords . 13
26 Terminals for external conductors . 14
27 Provision for earthing . 14
28 Screws and connections . 14
29 Clearances, creepage distances and solid insulation . 14
30 Resistance to heat and fire . 14
31 Resistance to rusting . 14
32 Radiation, toxicity and similar hazards . 14
Annexes . 15
Bibliography . 15

Figure 101 – Probe for measuring surface temperatures . 14
Table 101 – Maximum temperature rises of external accessible surfaces under normal
operating conditions. 10

+AMD2:2017 CSV © IEC 2017
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
SAFETY –
Part 2-12: Particular requirements for warming plates
and similar appliances
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on te
...

IEC 60335-2-12
Edition 5.0 2002-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Household and similar electrical appliances – Safety –
Part 2-12: Particular requirements for warming plates and similar appliances

Appareils électrodomestiques et analogues – Sécurité –
Partie 2-12: Règles particulières pour les chauffe-plats et appareils analogues

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by
any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either IEC or
IEC's member National Committee in the country of the requester.
If you have any questions about IEC copyright or have an enquiry about obtaining additional rights to this publication,
please contact the address below or your local IEC member National Committee for further information.

Droits de reproduction réservés. Sauf indication contraire, aucune partie de cette publication ne peut être reproduite
ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie
et les microfilms, sans l'accord écrit de la CEI ou du Comité national de la CEI du pays du demandeur.
Si vous avez des questions sur le copyright de la CEI ou si vous désirez obtenir des droits supplémentaires sur cette
publication, utilisez les coordonnées ci-après ou contactez le Comité national de la CEI de votre pays de résidence.

IEC Central Office
3, rue de Varembé
CH-1211 Geneva 20
Switzerland
Email: inmail@iec.ch
Web: www.iec.ch
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigenda or an amendment might have been published.
ƒ Catalogue of IEC publications: www.iec.ch/searchpub
The IEC on-line Catalogue enables you to search by a variety of criteria (reference number, text, technical committee,…).
It also gives information on projects, withdrawn and replaced publications.
ƒ IEC Just Published: www.iec.ch/online_news/justpub
Stay up to date on all new IEC publications. Just Published details twice a month all new publications released. Available
on-line and also by email.
ƒ Electropedia: www.electropedia.org
The world's leading online dictionary of electronic and electrical terms containing more than 20 000 terms and definitions
in English and French, with equivalent terms in additional languages. Also known as the International Electrotechnical
Vocabulary online.
ƒ Customer Service Centre: www.iec.ch/webstore/custserv
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A propos de la CEI
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normes internationales pour tout ce qui a trait à l'électricité, à l'électronique et aux technologies apparentées.

A propos des publications CEI
Le contenu technique des publications de la CEI est constamment revu. Veuillez vous assurer que vous possédez
l’édition la plus récente, un corrigendum ou amendement peut avoir été publié.
ƒ Catalogue des publications de la CEI: www.iec.ch/searchpub/cur_fut-f.htm
Le Catalogue en-ligne de la CEI vous permet d’effectuer des recherches en utilisant différents critères (numéro de référence,
texte, comité d’études,…). Il donne aussi des informations sur les projets et les publications retirées ou remplacées.
ƒ Just Published CEI: www.iec.ch/online_news/justpub
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Le premier dictionnaire en ligne au monde de termes électroniques et électriques. Il contient plus de 20 000 termes et
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Vocabulaire Electrotechnique International en ligne.
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Service clients ou contactez-nous:
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IEC 60335-2-12
Edition 5.0 2002-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Household and similar electrical appliances – Safety –
Part 2-12: Particular requirements for warming plates and similar appliances

Appareils électrodomestiques et analogues – Sécurité –
Partie 2-12: Règles particulières pour les chauffe-plats et appareils analogues

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
M
CODE PRIX
ICS 13.120; 97.040.50 ISBN 2-8318-8107-2
– 2 – 60335-2-12 © CEI:2002
SOMMAIRE
AVANT-PROPOS.4
INTRODUCTION.8
1 Domaine d'application .10
2 Références normatives.10
3 Définitions .10
4 Exigences générales .12
5 Conditions générales d'essais .12
6 Classification.12
7 Marquage et instructions .12
8 Protection contre l'accès aux parties actives .14
9 Démarrage des appareils à moteur.14
10 Puissance et courant .14
11 Echauffements .14
12 Vacant.14
13 Courant de fuite et rigidité diélectrique à la température de régime .14
14 Surtensions transitoires.16
15 Résistance à l'humidité.16
16 Courant de fuite et rigidité diélectrique .18
17 Protection contre la surcharge des transformateurs et des circuits associés.18
18 Endurance.18
19 Fonctionnement anormal .18
20 Stabilité et dangers mécaniques .18
21 Résistance mécanique .18
22 Construction .20
23 Conducteurs internes .20
24 Composants .20
25 Raccordement au réseau et câbles souples extérieurs .22
26 Bornes pour conducteurs externes .22
27 Dispositions en vue de la mise à la terre .22
28 Vis et connexions .22
29 Distances dans l'air, lignes de fuite et isolation solide .22
30 Résistance à la chaleur et au feu.22
31 Protection contre la rouille.22
32 Rayonnement, toxicité et dangers analogues.22

Annexes .24

Bibliographie.24

60335-2-12 © IEC:2002 – 3 –
CONTENTS
FOREWORD.5
INTRODUCTION.9
1 Scope.11
2 Normative references .11
3 Definitions .11
4 General requirement.13
5 General conditions for the tests .13
6 Classification.13
7 Marking and instructions.13
8 Protection against access to live parts.15
9 Starting of motor-operated appliances .15
10 Power input and current .15
11 Heating .15
12 Void.15
13 Leakage current and electric strength at operating temperature.15
14 Transient overvoltages .17
15 Moisture resistance .17
16 Leakage current and electric strength.19
17 Overload protection of transformers and associated circuits .19
18 Endurance.19
19 Abnormal operation .19
20 Stability and mechanical hazards .19
21 Mechanical strength .19
22 Construction .21
23 Internal wiring.21
24 Components .21
25 Supply connection and external flexible cords .23
26 Terminals for external conductors.23
27 Provision for earthing .23
28 Screws and connections .23
29 Clearances, creepage distances and solid insulation .23
30 Resistance to heat and fire.23
31 Resistance to rusting.23
32 Radiation, toxicity and similar hazards.23

Annexes .25

Bibliography.25

– 4 – 60335-2-12 © CEI:2002
COMMISSION ÉLECTROTECHNIQUE INTERNATIONALE
____________
APPAREILS ÉLECTRODOMESTIQUES ET ANALOGUES –
SÉCURITÉ –
Partie 2-12 : Règles particulières pour les chauffe-plats
et appareils analogues
AVANT-PROPOS
1) La Commission Electrotechnique Internationale (CEI) est une organisation mondiale de normalisation
composée de l'ensemble des comités électrotechniques nationaux (Comités nationaux de la CEI). La CEI a
pour objet de favoriser la coopération internationale pour toutes les questions de normalisation dans les
domaines de l'électricité et de l'électronique. A cet effet, la CEI – entre autres activités – publie des Normes
internationales, des Spécifications techniques, des Rapports techniques, des Spécifications accessibles au
public (PAS) et des Guides (ci-après dénommés "Publication(s) de la CEI"). Leur élaboration est confiée à des
comités d'études, aux travaux desquels tout Comité national intéressé par le sujet traité peut participer. Les
organisations internationales, gouvernementales et non gouvernementales, en liaison avec la CEI, participent
également aux travaux. La CEI collabore étroitement avec l'Organisation Internationale de Normalisation (ISO),
selon des conditions fixées par accord entre les deux organisations.
2) Les décisions ou accords officiels de la CEI concernant les questions techniques représentent, dans la mesure
du possible, un accord international sur les sujets étudiés, étant donné que les Comités nationaux de la CEI
intéressés sont représentés dans chaque comité d’études.
3) Les Publications de la CEI se présentent sous la forme de recommandations internationales et sont agréées
comme telles par les Comités nationaux de la CEI. Tous les efforts raisonnables sont entrepris afin que la CEI
s'assure de l'exactitude du contenu technique de ses publications; la CEI ne peut pas être tenue responsable
de l'éventuelle mauvaise utilisation ou interprétation qui en est faite par un quelconque utilisateur final.
4) Dans le but d'encourager l'uniformité internationale, les Comités nationaux de la CEI s'engagent, dans toute la
mesure possible, à appliquer de façon transparente les Publications de la CEI dans leurs publications
nationales et régionales. Toutes divergences entre toutes Publications de la CEI et toutes publications
nationales ou régionales correspondantes doivent être indiquées en termes clairs dans ces dernières.
5) La CEI n’a prévu aucune procédure de marquage valant indication d’approbation et n'engage pas sa
responsabilité pour les équipements déclarés conformes à une de ses Publications.
6) Tous les utilisateurs doivent s'assurer qu'ils sont en possession de la dernière édition de cette publication.
7) Aucune responsabilité ne doit être imputée à la CEI, à ses administrateurs, employés, auxiliaires ou
mandataires, y compris ses experts particuliers et les membres de ses comités d'études et des Comités
nationaux de la CEI, pour tout préjudice causé en cas de dommages corporels et matériels, ou de tout autre
dommage de quelque nature que ce soit, directe ou indirecte, ou pour supporter les coûts (y compris les frais
de justice) et les dépenses découlant de la publication ou de l'utilisation de cette Publication de la CEI ou de
toute autre Publication de la CEI, ou au crédit qui lui est accordé.
8) L'attention est attirée sur les références normatives citées dans cette publication. L'utilisation de publications
référencées est obligatoire pour une application correcte de la présente publication.
9) L’attention est attirée sur le fait que certains des éléments de la présente Publication de la CEI peuvent faire
l’objet de droits de propriété intellectuelle ou de droits analogues. La CEI ne saurait être tenue pour
responsable de ne pas avoir identifié de tels droits de propriété et de ne pas avoir signalé leur existence.
La présente partie de la Norme internationale CEI 60335 a été établie par le comité
d’études 61 de la CEI : Sécurité des appareils électrodomestiques et analogues.
Cette cinquième édition annule et remplace la quatrième édition parue en 1992 dont elle
constitue une révision technique.
Cette version bilingue, publiée en 2005-07, correspond à la version anglaise.
Le texte anglais de cette norme est issu des documents 61/2232/FDIS et 61/2307/RVD. Le
rapport de vote 61/2307/RVD donne toute information sur le vote ayant abouti à l’approbation
de cette norme.
60335-2-12 © IEC:2002 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
SAFETY –
Part 2-12: Particular requirements for warming plates
and similar appliances
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
This part of International Standard IEC 60335 has been prepared by IEC technical committee
61: Safety of household and similar electrical appliances.
This fifth edition cancels and replaces the fourth edition published in 1992. It constitutes a
technical revision.
This bilingual version, published in 2005-07, corresponds to the English version.
The text of this part of IEC 60335 is based on the following documents:
FDIS Report on voting
61/2232/FDIS 61/2307/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.

– 6 – 60335-2-12 © CEI:2002
La version française de cette norme n’a pas été soumise au vote.
La présente partie 2 doit être utilisée conjointement avec la dernière édition de la CEI 60335-1 et
ses amendements. Elle a été établie sur la base de la quatrième édition (2001) de cette norme.
NOTE 1 L’expression «Partie 1» utilisée dans la présente norme fait référence à la CEI 60335-1.
La présente partie 2 complète ou modifie les articles correspondants de la CEI 60335-1 de
façon à transformer cette publication en norme CEI : Règles de sécurité pour les chauffe-plats
électriques et appareils analogues.
Lorsqu'un paragraphe particulier de la Partie 1 n'est pas mentionné dans cette partie 2,
ce paragraphe s'applique pour autant qu'il est raisonnable. Lorsque la présente norme
spécifie «addition», «modification» ou «remplacement», le texte correspondant de la Partie 1
doit être adapté en conséquence.
NOTE 2 Le système de numérotation suivant est utilisé:
– paragraphes, tableaux et figures : ceux qui sont numérotés à partir de 101 sont supplémentaires à ceux de la
Partie 1;
– notes: à l’exception de celles qui sont dans un nouveau paragraphe ou de celles qui concernent des notes de
la Partie 1, les notes sont numérotées à partir de 101, y compris celles des articles ou paragraphes qui sont
modifiés ou remplacés;
– annexes: les annexes supplémentaires sont appelées AA, BB, etc.
NOTE 3 Les caractères d'imprimerie suivants sont utilisés:
– exigences: caractères romains;
– modalités d'essais: caractères italiques;
– notes: petits caractères romains.
Les mots en gras dans le texte sont définis à l'article 3. Lorsqu'une définition concerne un adjectif, l'adjectif et le
nom associé figurent également en gras.

Les différences supplémentaires suivantes existent dans les pays indiqués ci-après.
– 7.12: L'indication concernant les appareils avec une prise mobile de connecteur comportant un thermostat doit
être portée sur l'appareil (USA).

Le comité a décidé que le contenu de cette publication ne sera pas modifié avant la date de
maintenance indiquée sur le site web de la CEI sous «http://webstore.iec.ch» dans les
données relatives à la publication recherchée. A cette date, la publication sera
– reconduite;
– supprimée;
– remplacée par une édition révisée, ou
– amendée.
60335-2-12 © IEC:2002 – 7 –
The French version of this standard has not been voted upon.
This part 2 is to be used in conjunction with the latest edition of IEC 60335-1 and its
amendments. It was established on the basis of the fourth edition (2001) of that standard.
NOTE 1 When “Part 1” is mentioned in this standard, it refers to IEC 60335-1.
This part 2 supplements or modifies the corresponding clauses in IEC 60335-1, so as to
convert that publication into the IEC standard: Safety requirements for electric warming plates
and similar appliances.
When a particular subclause of Part 1 is not mentioned in this part 2, that subclause applies
as far as is reasonable. When this standard states “addition”, “modification” or “replacement”,
the relevant text in Part 1 is to be adapted accordingly.
NOTE 2 The following numbering system is used:
– subclauses, tables and figures that are numbered starting from 101 are additional to those in Part 1;
– unless notes are in a new subclause or involve notes in Part 1, they are numbered starting from 101, including
those in a replaced clause or subclause;
– additional annexes are lettered AA, BB, etc.
NOTE 3 The following print types are used:
– requirements: in roman type;
– test specifications: in italic type;
– notes: in small roman type.
Words in bold in the text are defined in Clause 3. When a definition concerns an adjective, the adjective and the
associated noun are also in bold.
The following differences exist in the countries indicated below.
– 7.12: The indication concerning appliances with a connector incorporating a thermostat is to be marked on
the appliance (USA).
The committee has decided that the contents of this publication will remain unchanged until
the maintenance result date indicated on the IEC web site under "http://webstore.iec.ch" in
the data related to the specific publication. At this date, the publication will be
• reconfirmed;
• withdrawn;
• replaced by a revised edition, or
• amended.
– 8 – 60335-2-12 © CEI:2002
INTRODUCTION
Il a été considéré en établissant la présente Norme internationale que l'exécution de ses
dispositions était confiée à des personnes expérimentées et ayant une qualification
appropriée.
Cette norme reconnaît le niveau de protection internationalement accepté contre les risques
électriques, mécaniques, thermiques, liés au feu et au rayonnement des appareils, lorsqu'ils
fonctionnent comme en usage normal en tenant compte des instructions du fabricant. Elle
couvre également les situations anormales auxquelles on peut s'attendre dans la pratique.
Cette norme tient compte autant que possible des exigences de la CEI 60364, de façon à
rester compatible avec les règles d'installation quand l’appareil est raccordé au réseau
d’alimentation. Cependant, des règles nationales d'installation peuvent être différentes.
Si un appareil compris dans le domaine d’application de cette norme comporte également des
fonctions qui sont couvertes par une autre partie 2 de la CEI 60335, la partie 2
correspondante est appliquée à chaque fonction séparément, dans la limite du raisonnable. Si
cela est applicable, on tient compte de l’influence d’une fonction sur les autres fonctions.
Cette norme est une norme de famille de produits traitant de la sécurité d’appareils et a
préséance sur les normes horizontales et génériques couvrant le même sujet.
Un appareil conforme au texte de la présente norme ne sera pas nécessairement jugé
conforme aux principes de sécurité de la norme si, lorsqu'il est examiné et soumis aux essais,
il apparaît qu'il présente d'autres caractéristiques qui compromettent le niveau de sécurité
visé par ces prescriptions.
Un appareil utilisant des matériaux ou présentant des modes de construction différents de
ceux décrits dans les prescriptions de cette norme peut être examiné et essayé en fonction
de l'objectif poursuivi par ces exigences et, s'il est jugé pratiquement équivalent, il peut être
estimé conforme aux principes de sécurité de la norme.

60335-2-12 © IEC:2002 – 9 –
INTRODUCTION
It has been assumed in the drafting of this International Standard that the execution of its
provisions is entrusted to appropriately qualified and experienced persons.
This standard recognizes the internationally accepted level of prote
...

IEC 60335-2-12
Edition 5.1 2008-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Household and similar electrical appliances – Safety –
Part 2-12: Particular requirements for warming plates and similar appliances

Appareils électrodomestiques et analogues – Sécurité –
Partie 2-12: Règles particulières pour les chauffe-plats et appareils analogues

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by
any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either IEC or
IEC's member National Committee in the country of the requester.
If you have any questions about IEC copyright or have an enquiry about obtaining additional rights to this publication,
please contact the address below or your local IEC member National Committee for further information.

Droits de reproduction réservés. Sauf indication contraire, aucune partie de cette publication ne peut être reproduite
ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie
et les microfilms, sans l'accord écrit de la CEI ou du Comité national de la CEI du pays du demandeur.
Si vous avez des questions sur le copyright de la CEI ou si vous désirez obtenir des droits supplémentaires sur cette
publication, utilisez les coordonnées ci-après ou contactez le Comité national de la CEI de votre pays de résidence.

IEC Central Office
3, rue de Varembé
CH-1211 Geneva 20
Switzerland
Email: inmail@iec.ch
Web: www.iec.ch
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigenda or an amendment might have been published.
ƒ Catalogue of IEC publications: www.iec.ch/searchpub
The IEC on-line Catalogue enables you to search by a variety of criteria (reference number, text, technical committee,…).
It also gives information on projects, withdrawn and replaced publications.
ƒ IEC Just Published: www.iec.ch/online_news/justpub
Stay up to date on all new IEC publications. Just Published details twice a month all new publications released. Available
on-line and also by email.
ƒ Electropedia: www.electropedia.org
The world's leading online dictionary of electronic and electrical terms containing more than 20 000 terms and definitions
in English and French, with equivalent terms in additional languages. Also known as the International Electrotechnical
Vocabulary online.
ƒ Customer Service Centre: www.iec.ch/webstore/custserv
If you wish to give us your feedback on this publication or need further assistance, please visit the Customer Service
Centre FAQ or contact us:
Email: csc@iec.ch
Tel.: +41 22 919 02 11
Fax: +41 22 919 03 00
A propos de la CEI
La Commission Electrotechnique Internationale (CEI) est la première organisation mondiale qui élabore et publie des
normes internationales pour tout ce qui a trait à l'électricité, à l'électronique et aux technologies apparentées.

A propos des publications CEI
Le contenu technique des publications de la CEI est constamment revu. Veuillez vous assurer que vous possédez
l’édition la plus récente, un corrigendum ou amendement peut avoir été publié.
ƒ Catalogue des publications de la CEI: www.iec.ch/searchpub/cur_fut-f.htm
Le Catalogue en-ligne de la CEI vous permet d’effectuer des recherches en utilisant différents critères (numéro de référence,
texte, comité d’études,…). Il donne aussi des informations sur les projets et les publications retirées ou remplacées.
ƒ Just Published CEI: www.iec.ch/online_news/justpub
Restez informé sur les nouvelles publications de la CEI. Just Published détaille deux fois par mois les nouvelles
publications parues. Disponible en-ligne et aussi par email.
ƒ Electropedia: www.electropedia.org
Le premier dictionnaire en ligne au monde de termes électroniques et électriques. Il contient plus de 20 000 termes et
définitions en anglais et en français, ainsi que les termes équivalents dans les langues additionnelles. Egalement appelé
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IEC 60335-2-12
Edition 5.1 2008-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Household and similar electrical appliances – Safety –
Part 2-12: Particular requirements for warming plates and similar appliances

Appareils électrodomestiques et analogues – Sécurité –
Partie 2-12: Règles particulières pour les chauffe-plats et appareils analogues

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CD
CODE PRIX
ICS 13.120; 97.040 ISBN 2-8318-9752-1
– 2 – 60335-2-12 © IEC:2002+A1:2008
CONTENTS
FOREWORD.3
INTRODUCTION.5
1 Scope.6
2 Normative references .6
3 Definitions .6
4 General requirement.7
5 General conditions for the tests .7
6 Classification.7
7 Marking and instructions.7
8 Protection against access to live parts.8
9 Starting of motor-operated appliances .8
10 Power input and current .8
11 Heating .8
12 Void.8
13 Leakage current and electric strength at operating temperature.8
14 Transient overvoltages .9
15 Moisture resistance .9
16 Leakage current and electric strength.10
17 Overload protection of transformers and associated circuits .10
18 Endurance.10
19 Abnormal operation .10
20 Stability and mechanical hazards .10
21 Mechanical strength .10
22 Construction .11
23 Internal wiring.11
24 Components .11
25 Supply connection and external flexible cords .12
26 Terminals for external conductors.12
27 Provision for earthing .12
28 Screws and connections .12
29 Clearances, creepage distances and solid insulation .12
30 Resistance to heat and fire.12
31 Resistance to rusting.12
32 Radiation, toxicity and similar hazards.12

Annexes .13

Bibliography.13

60335-2-12 © IEC:2002+A1:2008 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
SAFETY –
Part 2-12: Particular requirements for warming plates
and similar appliances
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
This part of International Standard IEC 60335 has been prepared by IEC technical committee 61:
Safety of household and similar electrical appliances.
This consolidated version of IEC 60335-2-12 consists of the fifth edition (2002) [documents
61/2232/FDIS and 61/2307/RVD] and its amendment 1 (2008) [documents 61/3541/FDIS and
61/3595/RVD].
The technical content is therefore identical to the base edition and its amendment and has
been prepared for user convenience.
It bears the edition number 5.1.
A vertical line in the margin shows where the base publication has been modified by
amendment 1.
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.

– 4 – 60335-2-12 © IEC:2002+A1:2008
The French version of this standard has not been voted upon.
This part 2 is to be used in conjunction with the latest edition of IEC 60335-1 and its
amendments. It was established on the basis of the fourth edition (2001) of that standard.
NOTE 1 When “Part 1” is mentioned in this standard, it refers to IEC 60335-1.
This part 2 supplements or modifies the corresponding clauses in IEC 60335-1, so as to
convert that publication into the IEC standard: Safety requirements for electric warming plates
and similar appliances.
When a particular subclause of Part 1 is not mentioned in this part 2, that subclause applies
as far as is reasonable. When this standard states “addition”, “modification” or “replacement”,
the relevant text in Part 1 is to be adapted accordingly.
NOTE 2 The following numbering system is used:
– subclauses, tables and figures that are numbered starting from 101 are additional to those in Part 1;
– unless notes are in a new subclause or involve notes in Part 1, they are numbered starting from 101, including
those in a replaced clause or subclause;
– additional annexes are lettered AA, BB, etc.
NOTE 3 The following print types are used:
– requirements: in roman type;
– test specifications: in italic type;
– notes: in small roman type.
Words in bold in the text are defined in Clause 3. When a definition concerns an adjective, the adjective and the
associated noun are also in bold.
The following differences exist in the countries indicated below.
– 7.12: The indication concerning appliances with a connector incorporating a thermostat is to be marked on
the appliance (USA).
The committee has decided that the contents of the base publication and its amendments will
remain unchanged until the maintenance result date indicated on the IEC web site under
"http://webstore.iec.ch" in the data related to the specific publication. At this date,
the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
NOTE 4 The attention of National Committees is drawn to the fact that equipment manufacturers and testing
organizations may need a transitional period following publication of a new, amended or revised IEC publication in
which to make products in accordance with the new requirements and to equip themselves for conducting new or
revised tests.
It is the recommendation of the committee that the content of the amendment 1 be adopted for implementation
nationally not earlier than 12 months or later than 36 months from the date of publication.

60335-2-12 © IEC:2002+A1:2008 – 5 –
INTRODUCTION
It has been assumed in the drafting of this International Standard that the execution of its
provisions is entrusted to appropriately qualified and experienced persons.
This standard recognizes the internationally accepted level of protection against hazards such
as electrical, mechanical, thermal, fire and radiation of appliances when operated as in
normal use taking into account the manufacturer's instructions. It also covers abnormal
situations that can be expected in practice and takes into account the way in which
electromagnetic phenomena can affect the safe operation of appliances.
This standard takes into account the requirements of IEC 60364 as far as possible so that
there is compatibility with the wiring rules when the appliance is connected to the supply
mains. However, national wiring rules may differ.
If an appliance within the scope of this standard also incorporates functions that are covered
by another part 2 of IEC 60335, the relevant part 2 is applied to each function separately, as
far as is reasonable. If applicable, the influence of one function on the other is taken into
account.
When a part 2 standard does not include additional requirements to cover hazards dealt with
in Part 1, Part 1 applies.
NOTE 1 This means that the technical committees responsible for the part 2 standards have determined that it is
not necessary to specify particular requirements for the appliance in question over and above the general
requirements.
This standard is a product family standard dealing with the safety of appliances and takes
precedence over horizontal and generic standards covering the same subject.
NOTE 2 Horizontal and generic standards covering a hazard are not applicable since they have been taken into
consideration when developing the general and particular requirements for the IEC 60335 series of standards. For
example, in the case of temperature requirements for surfaces on many appliances, generic standards, such as
ISO 13732-1 for hot surfaces, are not applicable in addition to Part 1 or part 2 standards.
An appliance that complies with the text of this standard will not necessarily be considered to
comply with the safety principles of the standard if, when examined and tested, it is found to
have other features that impair the level of safety covered by these requirements.
An appliance employing materials or having forms of construction differing from those detailed
in the requirements of this standard may be examined and tested according to the intent of
the requirements and, if found to be substantially equivalent, may be considered to comply
with the standard.
– 6 – 60335-2-12 © IEC:2002+A1:2008
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
SAFETY –
Part 2-12: Particular requirements for warming plates
and similar appliances
1 Scope
This clause of Part 1 is replaced by the following.
This International Standard deals with the safety of electric warming plates, warming trays
and similar appliances intended to keep food or vessels warm, for household and similar
purposes, their rated voltage being not more than 250 V.
Appliances intended for normal household and similar use and that may also be used by
laymen in shops, in light industry and on farms are within the scope of this standard.
However, if the appliance is intended to be used professionally to keep vessels warm or to
process food for commercial consumption, the appliance is not considered to be for
household and similar use only.
As far as is practicable, this standard deals with the common hazards presented by
appliances that are encountered by all persons in and around the home. However, in general,
it does not take into account
– persons (including children) whose
• physical, sensory or mental capabilities; or
• lack of experience and knowledge
prevents them from using the appliance safely without supervision or instruction;
– children playing with the appliance.
NOTE 101 Attention is drawn to the fact that
– for appliances intended to be used in vehicles or on board ships or in aircraft, additional requirements may be
necessary;
– in many countries additional requirements are specified by the national health authorities, the national
authorities responsible for the protection of labour and similar authorities.
NOTE 102 This standard does not apply to
– appliances made of flexible material, such as textile material;
– appliances intended exclusively to be used in locations where special conditions prevail, such as the presence
of a corrosive or explosive atmosphere (dust, vapour or gas);
– appliances intended exclusively for commercial catering or industrial purposes.
2 Normative references
This clause of Part 1 is applicable.
3 Definitions
This clause of Part 1 is applicable except as follows.

60335-2-12 © IEC:2002+A1:2008 – 7 –
3.1.9 Replacement:
normal operation
operation of the appliance under the following conditions
The appliance is operated with a shallow pan, 150 mm in diameter and filled with water to a
height of at least 25 mm, placed on the heated surface. If vessels are supplied with the
appliance, or specified in the instructions, these are used instead.
The appliance is operated without a pan if this condition is more unfavourable.
4 General requirement
This clause of Part 1 is applicable.
5 General conditions for the tests
This clause of Part 1 is applicable except as follows.
5.2 Addition:
NOTE 101 If the test of 15.101 has to be carried out, three additional samples are required.
6 Classification
This clause of Part 1 is applicable.
7 Marking and instructions
This clause of Part 1 is applicable except as follows.
7.1 Addition:
Appliances intended to be partially immersed in water for cleaning shall be marked with the
maximum level of immersion and with the substance of the following:
Do not immerse beyond this level.
7.12 Addition:
The instructions shall include the substance of the following:
This appliance is intended to be used in household and similar applications such as:
– staff kitchen areas in shops, offices and other working environments;
– farm houses;
– by clients in hotels, motels and other residential type environments;
– bed and breakfast type environments.
NOTE 101 If the manufacturer wants to limit the use of the appliance to less than the above, this has to be
clearly stated in the instructions.
The instructions for appliances incorporating an appliance inlet, and intended to be partially or
completely immersed in water for cleaning, shall state that the connector must be removed
before the appliance is cleaned and that the appliance inlet must be dried before the
appliance is used again.
– 8 – 60335-2-12 © IEC:2002+A1:2008
The instructions for appliances intended to be used with a connector incorporating a
thermostat shall state that only the appropriate connector must be used.
The instructions for appliances having surfaces of glass-ceramic or similar material that forms
part of the enclosure of live parts shall include the substance of the following:
WARNING: Do not use the appliance if the surface is cracked.
The instructions for appliances that have to be used with particular vessels that are not
supplied shall specify the vessels to be used.
8 Protection against access to live parts
This clause of Part 1 is applicable.
9 Starting of motor-operated appliances
This clause of Part 1 is not applicable.
10 Power input and current
This clause of Part 1 is applicable.
11 Heating
This clause of Part 1 is applicable except as follows.
11.2 Modification:
Portable appliances are placed away from the walls of the test corner.
11.7 Replacement:
Appliances are operated until steady conditions are established.
11.8 Addition:
When an appliance connector incorporates a thermostat, the temperature rise limit for the
pins of the inlet does not apply.
12 Void
13 Leakage current and electric strength at operating temperature
This clause of Part 1 is applicable except as follows.
13.2 Modification:
For appliances that are intended to be used with particular metallic vessels, the vessels are
placed on the heated surface and connected to accessible metal parts. The metal foil is not
in contact with the heated surface.

60335-2-12 © IEC:2002+A1:2008 – 9 –
For other appliances, vessels are not placed on the heated surface, the metal foil being in
contact with accessible surfaces of insulating material.
14 Transient overvoltages
This clause of Part 1 is applicable.
15 Moisture resistance
This clause of Part 1 is applicable except as follows.
15.2 Addition:
Appliances without containers are tested with 0,01 l of saline solution for each 100 cm² of the
heated surface. The solution is poured steadily over the surface over a period of 1 min.
NOTE 101 Appliances that can only be used for warming crockery are not subjected to this test.
15.101 Appliances intended to be partially or completely immersed in water for cleaning
shall have adequate protection against the effects of immersion.
Compliance is checked by the following tests, which are carried out on three additional
appliances.
The appliances are operated under normal operation at 1,15 times rated power input, until
the thermostat operates for the first time. Appliances without a thermostat are operated until
steady conditions are established. The appliances are disconnected from the supply, any
appliance connector being withdrawn. They are then completely immersed in water
containing approximately 1 % NaCl and having a temperature between 10 °C and 25 °C,
unless they are marked with the maximum level of immersion, in which case they are
immersed 50 mm deeper than this level.
After 1 h, the appliances are removed from the saline solution, dried and subjected to the
leakage current test of 16.2.
NOTE Care is to be taken to ensure that all moisture is removed from the insulation around the pins of appliance
inlets.
This test is carried out four more times, after which the appliances shall withstand the electric
strength test of 16.3, the voltage being as specified in Table 4.
The appliance having the highest leakage current after the fifth immersion is dismantled and
inspection shall show that there is no trace of liquid on insulation that could result in a
reduction of clearances and creepage distances below the values specified in Clause 29.
The remaining two appliances are operated under normal operation at 1,15 times rated
power input for 240 h. After this period, the appliances are disconnected from the supply
and immersed again for 1 h. They are then dried and subjected to the electric strength test of
16.3, the voltage being as specified in Table 4.
Inspection shall show that there is no trace of liquid on insulation that could result in a
reduction of clearances and creepage distances below the values specified in Clause 29.

– 10 – 60335-2-12 © IEC:2002+A1:2008
16 Leakage current and electric strength
This clause of Part 1 is applicable.
17 Overload protection of transformers and associated circuits
This clause of Part 1 is applicable.
18 Endurance
This clause of Part 1 is not applicable.
19 Abnormal operation
This clause of Part 1 is applicable except as follows.
19.1 Modification:
Instead of being subjected to the tests of 19.2 and 19.3, appliances are subjected to the test
of 19.101.
19.101 The appliance is operated at rated power input with the heated surface completely
covered with felt strips for 7 h.
The felt strips have a width of 100 mm and are lined with a single layer of textile material. The
felt has a specific mass of 4 kg/m² ± 0,4 kg/m² and a thickness of approximately 25 mm. The
textile material consists of pre-washed double-hemmed cotton sheet having a mass between
140 g/m² and 175 g/m² in the dry condition.
If a thermostat operates, the test is repeated with the one-third of the heated surface furthest
from the temperature-sensing element covered.
20 Stability and mechanical hazards
This clause of Part 1 is applicable.
21 Mechanical strength
This clause of Part 1 is applicable except as follows.
Addition:
For appliances having surfaces of glass-ceramic or similar material that forms part of the
enclosure of live parts, three blows having an impact energy of 0,70 J are also applied to
parts of such surfaces that are not exposed to impacts during the test of 21.101.
21.101 Appliances having surfaces of glass-ceramic or similar material that forms part of the
enclosure of live parts, shall withstand the stresses liable to occur in normal use.

60335-2-12 © IEC:2002+A1:2008 – 11 –
Compliance is checked by the following test.
A vessel with its base horizontal is dropped from a height of 150 mm onto the surface. The
vessel has a copper or aluminium base that is flat over a diameter of 120 mm ± 10 mm, its
edges being rounded with a radius of at least 10 mm. It is uniformly filled with at least 1,3 kg
of sand or shot so that the total mass is 1,80 kg ± 0,01 kg. The vessel is dropped 10 times.
The appliance is then supplied at rated voltage and operated until steady conditions are
established. A wet pad having dimensions approximately 100 mm x 100 mm is then applied to
the most unfavourable part of the surface. The pad is formed from a cotton sheet
400 mm x 400 mm having a mass between 140 g/m² and 175 g/m² in the dry condition. The
sheet is folded four times to form the pad, which is then soaked with water containing
approximately 1 % NaCl.
The surface shall not be broken and the appliance shall withstand the leakage current test of
16.2.
22 Construction
This clause of Part 1 is applicable except as follows.
22.101 Portable appliances shall not have openings on the underside that would allow
small items to penetrate and touch live parts.
Compliance is checked by inspection and by measuring the distance between the supporting
surface and live parts through openings. This distance shall be at least 6 mm. However, if the
appliance is fitted with legs, this distance is increased to 10 mm if the appliance is intended to
stand on the table and to 20 mm if it is intended to stand on the floor.
23 Internal wiring
This clause of Part 1 is applicable.
24 Components
This clause of Part 1 is applicable except as follows.
24.1.5 Addition:
For appliance couplers incorporating thermostats, thermal cut-outs or fuses in the
connector, IEC 60320-1 is applicable except that
– the earthing contact of the connector is allowed to be accessible, provided that this
contact is not likely to be gripped during insertion or withdrawal of the connector;
– the temperature required for the test of Clause 18 is that measured on the pins of the
appliance inlet during the heating test of Clause 11 of this standard;
– the breaking-capacity test of Clause 19 is carried out using the inlet of the appliance;
– the temperature rise of current-carrying parts specified in Clause 21 is not determined.
NOTE 101 Thermal controls are not allowed in connectors complying with the standard sheets of IEC 60320-1.

– 12 – 60335-2-12 © IEC:2002+A1:2008
25 Supply connection and external flexible cords
This clause of Part 1 is applicable except as follows.
25.1 Addition:
Appliances incorporating an appliance inlet that does not comply with the standard sheets of
IEC 60320-1 shall be supplied with a cord set.
25.7 Addition:
Light polyvinyl chloride sheathed cord (code designation 60227 IEC 5
...

IEC 60335-2-12 ®
Edition 5.2 2017-10
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Household and similar electrical appliances – Safety –
Part 2-12: Particular requirements for warming plates and similar appliances

Appareils électrodomestiques et analogues – Sécurité –
Partie 2-12: Règles particulières pour les chauffe-plats et appareils analogues

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IEC 60335-2-12 ®
Edition 5.2 2017-10
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Household and similar electrical appliances – Safety –

Part 2-12: Particular requirements for warming plates and similar appliances

Appareils électrodomestiques et analogues – Sécurité –

Partie 2-12: Règles particulières pour les chauffe-plats et appareils analogues

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 13.120; 97.040.50 ISBN 978-2-8322-7684-6

IEC 60335-2-12 ®
Edition 5.2 2017-10
CONSOLIDATED VERSION
REDLINE VERSION
VERSION REDLINE
colour
inside
Household and similar electrical appliances – Safety –
Part 2-12: Particular requirements for warming plates and similar appliances

Appareils électrodomestiques et analogues – Sécurité –
Partie 2-12: Règles particulières pour les chauffe-plats et appareils analogues

– 2 – IEC 60335-2-12:2002+AMD1:2008
+AMD2:2017 CSV © IEC 2017
CONTENTS
FOREWORD . 3
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 8
3 Definitions . 8
4 General requirement . 8
5 General conditions for the tests . 8
6 Classification . 8
7 Marking and instructions . 8
8 Protection against access to live parts . 9
9 Starting of motor-operated appliances . 10
10 Power input and current . 10
11 Heating . 10
12 Void. 11
13 Leakage current and electric strength at operating temperature . 11
14 Transient overvoltages . 11
15 Moisture resistance . 12
16 Leakage current and electric strength . 12
17 Overload protection of transformers and associated circuits . 12
18 Endurance . 13
19 Abnormal operation . 13
20 Stability and mechanical hazards . 13
21 Mechanical strength . 13
22 Construction . 14
23 Internal wiring . 14
24 Components . 14
25 Supply connection and external flexible cords . 14
26 Terminals for external conductors . 15
27 Provision for earthing . 15
28 Screws and connections . 15
29 Clearances, creepage distances and solid insulation . 15
30 Resistance to heat and fire . 15
31 Resistance to rusting . 15
32 Radiation, toxicity and similar hazards . 15
Annexes . 16
Bibliography . 16

Figure 101 – Probe for measuring surface temperatures . 15

Table 101 – Maximum temperature rises of external accessible surfaces under normal
operating conditions. 11

+AMD2:2017 CSV © IEC 2017
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
SAFETY –
Part 2-12: Particular requirements for warming plates
and similar appliances
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
This consolidated version of the official IEC Standard and its amendments has been prepared
for user convenience.
IEC 60335-2-12 edition 5.2 contains the fifth edition (2002-10) [documents 61/2232/FDIS and
61/2307/RVD], its amendment 1 (2008-04) [documents 61/3541/FDIS and 61/3595/RVD] and its
amendment 2 (2017-10) [documents 61/5313/CDV and 61/5434A/RVC].
In this Redline version, a vertical line in the margin shows where the technical content is
modified by amendments 1 and 2. Additions are in green text, deletions are in strikethrough red
text. A separate Final version with all changes accepted is available in this publication.

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This part of International Standard IEC 60335 has been prepared by IEC technical committee
61: Safety of household and similar electrical appliances.
This fifth edition constitutes a technical revision.
This part 2 is to be used in conjunction with the latest edition of IEC 60335-1 and its
amendments. It was established on the basis of the fourth edition (2001) of that standard.
NOTE 1 When “Part 1” is mentioned in this standard, it refers to IEC 60335-1.
This part 2 supplements or modifies the corresponding clauses in IEC 60335-1, so as
to convert that publication into the IEC standard: Safety requirements for electric warming
plates and similar appliances.
When a particular subclause of Part 1 is not mentioned in this part 2, that subclause
applies as far as is reasonable. When this standard states “addition”, “modification” or
“replacement”, the relevant text in Part 1 is to be adapted accordingly.
NOTE 2 The following numbering system is used:
– subclauses, tables and figures that are numbered starting from 101 are additional to those in Part 1;
– unless notes are in a new subclause or involve notes in Part 1, they are numbered starting from 101, including
those in a replaced clause or subclause;
– additional annexes are lettered AA, BB, etc.
NOTE 3 The following print types are used:
– requirements: in roman type;
– test specifications: in italic type;
– notes: in small roman type.
Words in bold in the text are defined in Clause 3. When a definition concerns an adjective, the adjective and the
associated noun are also in bold.
The following differences exist in the countries indicated below.
– 7.12: The indication concerning appliances with a connector incorporating a thermostat is to be marked on
the appliance (USA).
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The committee has decided that the contents of the base publication and its amendments will
remain unchanged until the stability date indicated on the IEC web site under
"http://webstore.iec.ch" in the data related to the specific publication. At this date, the
publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
NOTE 4 The attention of National Committees is drawn to the fact that equipment manufacturers and testing
organizations may need a transitional period following publication of a new, amended or revised IEC publication in
which to make products in accordance with the new requirements and to equip themselves for conducting new or
revised tests.
It is the recommendation of the committee that the content of this publication be adopted for implementation
nationally not earlier than 12 months or later than 36 months from the date of publication.

IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct
understanding of its contents. Users should therefore print this document using a
colour printer.
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INTRODUCTION
It has been assumed in the drafting of this International Standard that the execution of its
provisions is entrusted to appropriately qualified and experienced persons.
This standard recognizes the internationally accepted level of protection against hazards such
as electrical, mechanical, thermal, fire and radiation of appliances when operated as in
normal use taking into account the manufacturer's instructions. It also covers abnormal
situations that can be expected in practice and takes into account the way in which
electromagnetic phenomena can affect the safe operation of appliances.
This standard takes into account the requirements of IEC 60364 as far as possible so that
there is compatibility with the wiring rules when the appliance is connected to the supply
mains. However, national wiring rules may differ.
If an appliance within the scope of this standard also incorporates functions that are covered
by another part 2 of IEC 60335, the relevant part 2 is applied to each function separately, as
far as is reasonable. If applicable, the influence of one function on the other is taken into
account.
When a part 2 standard does not include additional requirements to cover hazards dealt with
in Part 1, Part 1 applies.
NOTE 1 This means that the technical committees responsible for the part 2 standards have determined that it is
not necessary to specify particular requirements for the appliance in question over and above the general
requirements.
This standard is a product family standard dealing with the safety of appliances and takes
precedence over horizontal and generic standards covering the same subject.
NOTE 2 Horizontal and generic standards covering a hazard are not applicable since they have been taken into
consideration when developing the general and particular requirements for the IEC 60335 series of standards. For
example, in the case of temperature requirements for surfaces on many appliances, generic standards, such as
ISO 13732-1 for hot surfaces, are not applicable in addition to Part 1 or part 2 standards
An appliance that complies with the text of this standard will not necessarily be considered to
comply with the safety principles of the standard if, when examined and tested, it is found to
have other features that impair the level of safety covered by these requirements.
An appliance employing materials or having forms of construction differing from those detailed
in the requirements of this standard may be examined and tested according to the intent of
the requirements and, if found to be substantially equivalent, may be considered to comply
with the standard.
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HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
SAFETY –
Part 2-12: Particular requirements for warming plates
and similar appliances
1 Scope
This clause of Part 1 is replaced by the following.
This International Standard deals with the safety of electric warming plates, warming trays
and similar appliances intended to keep food or vessels warm, for household and similar
purposes, their rated voltage being not more than 250 V.
Appliances not intended for normal household use but that nevertheless may be a source of
danger to the public, such as appliances intended to be used by laymen in shops, in light
industry and on farms, are also within the scope of this standard.
Appliances intended for normal household and similar use and that may also be used by
laymen in shops, in light industry and on farms are within the scope of this standard.
However, if the appliance is intended to be used professionally to keep vessels warm or to
process food for commercial consumption, the appliance is not considered to be for
household and similar use only.
As far as is practicable, this standard deals with the common hazards presented by
appliances that are encountered by all persons in and around the home. However, in general,
it does not take into account
– the use of appliances by young children or infirm persons without supervision;
– playing with the appliance by young children.
– persons (including children) whose
• physical, sensory or mental capabilities; or
• lack of experience and knowledge
prevents them from using the appliance safely without supervision or instruction;
– children playing with the appliance.
NOTE 101 Attention is drawn to the fact that
– for appliances intended to be used in vehicles or on board ships or in aircraft, additional requirements may be
necessary;
– in many countries additional requirements are specified by the national health authorities, the national
authorities responsible for the protection of labour and similar authorities.
NOTE 102 This standard does not apply to
– appliances made of flexible material, such as textile material;
– appliances intended exclusively to be used in locations where special conditions prevail, such as the presence
of a corrosive or explosive atmosphere (dust, vapour or gas);
– appliances intended exclusively for commercial catering or industrial purposes.

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2 Normative references
This clause of Part 1 is applicable except as follows.
Addition:
IEC 60584-1, Thermocouples – Part 1: EMF specifications and tolerances
3 Definitions
This clause of Part 1 is applicable except as follows.
3.1.9 Replacement:
normal operation
operation of the appliance under the following conditions
The appliance is operated with a shallow pan, 150 mm in diameter and filled with water to a
height of at least 25 mm, placed on the heated surface. If vessels are supplied with the
appliance, or specified in the instructions, these are used instead.
The appliance is operated without a pan if this condition is more unfavourable.
3.6.101
hot functional surface
surface that is intentionally heated by an internal heat source and that has to be hot to carry
out the intended function of the appliance
4 General requirement
This clause of Part 1 is applicable.
5 General conditions for the tests
This clause of Part 1 is applicable except as follows.
5.2 Addition:
NOTE 101 If the test of 15.101 has to be carried out, three additional samples are required.
6 Classification
This clause of Part 1 is applicable.
7 Marking and instructions
This clause of Part 1 is applicable except as follows.
7.1 Addition:
Appliances intended to be partially immersed in water for cleaning shall be marked with the
maximum level of immersion and with the substance of the following:
Do not immerse beyond this level.
When the provisions of footnote b to Table 101 apply, the appliance shall be marked with:

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– the substance of “CAUTION: Hot surface”, or
– symbol IEC 60417-5041 (2002-10).
7.6 Addition:
[symbol IEC 60417-5041 (2002-10)] caution, hot surface

7.12 Addition:
The instructions shall include the substance of the following:
This appliance is intended to be used in household and similar applications such as:
– staff kitchen areas in shops, offices and other working environments;
– farm houses;
– by clients in hotels, motels and other residential type environments;
– bed and breakfast type environments.
NOTE 101 If the manufacturer wants to limit the use of the appliance to less than the above, this has to be
clearly stated in the instructions.
The instructions for appliances incorporating an appliance inlet, and intended to be partially or
completely immersed in water for cleaning, shall state that the connector must be removed
before the appliance is cleaned and that the appliance inlet must be dried before the
appliance is used again.
The instructions for appliances intended to be used with a connector incorporating a
thermostat shall state that only the appropriate connector must be used.
The instructions for appliances having surfaces of glass-ceramic or similar material that forms
part of the enclosure of live parts shall include the substance of the following:
WARNING: Do not use the appliance if the surface is cracked.
The instructions for appliances that have to be used with particular vessels that are not
supplied shall specify the vessels to be used.
If symbol IEC 60417-5041 (2002-10) is marked on appliances, its meaning shall be explained
and location of areas where the limits are exceeded shall be stated or shown by a drawing.
7.14 Addition:
The height of the triangle in symbol IEC 60417-5041 (2002-10) shall be at least 10 mm.
Compliance is checked by measurement.
7.15 Addition:
The marking specified for hot surfaces shall be clearly visible when the appliance is operated
as in normal use, including when actuating any switch, adjusting any control or opening a lid
or door. It shall not be placed on a hot functional surface or on surfaces that are exempted
from the limits of Table 101.
8 Protection against access to live parts
This clause of Part 1 is applicable.

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9 Starting of motor-operated appliances
This clause of Part 1 is not applicable.
10 Power input and current
This clause of Part 1 is applicable.
11 Heating
This clause of Part 1 is applicable except as follows.
11.2 Modification:
Portable appliances are placed away from the walls of the test corner.
11.3 Addition:
Where the external accessible surfaces are suitably flat and access permits, then the test
probe of Figure 101 is used to measure the temperature rises of external accessible
surfaces specified in Table 101. The probe is applied with a force of 4 N ± 1 N to the surface
in such a way that the best possible contact between the probe and the surface is ensured.
The measurement is performed after a contact period of 30 s.
The probe may be held in place using a laboratory stand clamp or similar device. Any
measuring instrument giving the same results as the probe may be used.
11.7 Replacement:
Appliances are operated until steady conditions are established.
11.8 Addition:
When an appliance connector incorporates a thermostat, the temperature rise limit for the
pins of the inlet does not apply.
Addition:
During the test, the temperature rises are monitored continuously and shall not exceed the
values shown in Table 101.
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Table 101 – Maximum temperature rises of external accessible surfaces
under normal operating conditions
a
Temperature rise of external accessible surfaces
K
Surface
Appliances and parts situated not Appliances and parts situated
more than 850 mm above the floor more than 850 mm above the
b b
after installation floor after installation
Bare metal 38 42
c 42 49
Coated metal
51 56
Glass and ceramic
58 62
Plastic and plastic coating > 0,4 mm
d, e
a
The following surfaces or elements shall not be taken into consideration:
– hot functional surfaces;
– handles or control knobs including keypads, keyboards and the like: part of the equipment that a user
needs to touch to operate or adjust the equipment. The equipment has to be installed according to the
manufacturer’s instructions;
– surfaces within 5 mm of touch controls regardless of their shape;
– surfaces within 25 mm of the outline of the hot functional surfaces;
– underside surfaces that are not accessible to a 75 mm diameter probe having a hemispherical end;
– lids and covers.
b
When the required values are not met, the maximum temperature rise shall not be higher than two times the
values indicated.
c
Metal is considered coated when a coating having a minimum thickness of 90 µm made by enamel, powder or
non-substantially plastic coating is used.
d
The temperature rise limit of plastic also applies for plastic material having a metal finish of thickness less
than 0,1 mm.
e
When the thickness of the plastic coating does not exceed 0,4 mm, the temperature rise limits of the coated
metal or of glass and ceramic material apply.

12 Void
13 Leakage current and electric strength at operating temperature
This clause of Part 1 is applicable except as follows.
13.2 Modification:
For appliances that are intended to be used with particular metallic vessels, the vessels are
placed on the heated surface and connected to accessible metal parts. The metal foil is not
in contact with the heated surface.
For other appliances, vessels are not placed on the heated surface, the metal foil being in
contact with accessible surfaces of insulating material.
14 Transient overvoltages
This clause of Part 1 is applicable.

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15 Moisture resistance
This clause of Part 1 is applicable except as follows.
15.2 Addition:
Appliances without containers are tested with 0,01 l of saline solution for each 100 cm² of the
heated surface. The solution is poured steadily over the surface over a period of 1 min.
NOTE 101 Appliances that can only be used for warming crockery are not subjected to this test.
15.101 Appliances intended to be partially or completely immersed in water for cleaning
shall have adequate protection against the effects of immersion.
Compliance is checked by the following tests, which are carried out on three additional
appliances.
The appliances are operated under normal operation at 1,15 times rated power input, until
the thermostat operates for the first time. Appliances without a thermostat are operated until
steady conditions are established. The appliances are disconnected from the supply, any
appliance connector being withdrawn. They are then completely immersed in water
containing approximately 1 % NaCl and having a temperature between 10 °C and 25 °C,
unless they are marked with the maximum level of immersion, in which case they are
immersed 50 mm deeper than this level.
After 1 h, the appliances are removed from the saline solution, dried and subjected to the
leakage current test of 16.2.
NOTE Care is to be taken to ensure that all moisture is removed from the insulation around the pins of appliance
inlets.
This test is carried out four more times, after which the appliances shall withstand the electric
strength test of 16.3, the voltage being as specified in Table 4.
The appliance having the highest leakage current after the fifth immersion is dismantled and
inspection shall show that there is no trace of liquid on insulation that could result in a
reduction of clearances and creepage distances below the values specified in Clause 29.
The remaining two appliances are operated under normal operation at 1,15 times rated
power input for 240 h. After this period, the appliances are disconnected from the supply
and immersed again for 1 h. They are then dried and subjected to the electric strength test of
16.3, the voltage being as specified in Table 4.
Inspection shall show that there is no trace of liquid on insulation that could result in a
reduction of clearances and creepage distances below the values specified in Clause 29.
16 Leakage current and electric strength
This clause of Part 1 is applicable.
17 Overload protection of transformers and associated circuits
This clause of Part 1 is applicable.

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18 Endurance
This clause of Part 1 is not applicable.
19 Abnormal operation
This clause of Part 1 is applicable except as follows.
19.1 Modification:
Instead of being subjected to the tests of 19.2 and 19.3, appliances are subjected to the test
of 19.101.
19.101 The appliance is operated at rated power input with the heated surface completely
covered with felt strips for 7 h.
The felt strips have a width of 100 mm and are lined with a single layer of textile material. The
felt has a specific mass of 4 kg/m² ± 0,4 kg/m² and a thickness of approximately 25 mm. The
textile material consists of pre-washed double-hemmed cotton sheet having a mass between
140 g/m² and 175 g/m² in the dry condition.
If a thermostat operates, the test is repeated with the one-third of the heated surface furthest
from the temperature-sensing element covered.
20 Stability and mechanical hazards
This clause of Part 1 is applicable.
21 Mechanical strength
This clause of Part 1 is applicable except as follows.
Addition:
For appliances having surfaces of glass-ceramic or similar material that forms part of the
enclosure of live parts, three blows having an impact energy of 0,70 J are also applied to
parts of such surfaces that are not exposed to impacts during the test of 21.101.
21.101 Appliances having surfaces of glass-ceramic or similar material that forms part of the
enclosure of live parts, shall withstand the stresses liable to occur in normal use.
Compliance is checked by the following test.
A vessel with its base horizontal is dropped from a height of 150 mm onto the surface. The
vessel has a copper or aluminium base that is flat over a diameter of 120 mm ± 10 mm, its
edges being rounded with a radius of at least 10 mm. It is uniformly filled with at least 1,3 kg
of sand or shot so that the total mass is 1,80 kg ± 0,01 kg. The vessel is dropped 10 times.
The appliance is then supplied at rated voltage and operated until steady conditions are
established. A wet pad having dimensions approximately 100 mm x 100 mm is then applied to
the most unfavourable part of the surface. The pad is formed from a cotton sheet
400 mm x 400 mm having a mass between 140 g/m² and 175 g/m² in the dry condition. The
sheet is folded four times to form the pad, which is then soaked with water containing
approximately 1 % NaCl.
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The surface shall not be broken and the appliance shall withstand the leakage current test of
16.2.
22 Construction
This clause of Part 1 is applicable except as follows.
22.101 Portable appliances shall not have openings on the underside that would allow
small items to penetrate and touch live parts.
Compliance is checked by inspection and by measuring the distance between the supporting
surface and live parts through openings. This distance shall be at least 6 mm. However, if the
appliance is fitted with legs, this distance is increased to 10 mm if the appliance is intended to
stand on the table and to 20 mm if it is intended to stand on the floor.
23 Internal wiring
This clause of Part 1 is applicable.
24 Components
This clause of Part 1 is applicable except as follows.
24.1.5 Addition:
For appliance couplers incorporating thermostats, thermal cut-outs or fuses in the
connector, IEC 60320-1 is applicable except that
– the earthing contact of the connector is allowed to be accessible, provided that this
contact is not likely to be gripped during insertion or withdrawal of the connector;
– the temperature required for the test of Clause 18 is that measured on the pins of the
appliance inlet during the heating test of Clause 11 of this standard;
– the breaking-capacity test of Clause 19 is carried out using the inlet of the appliance;
– the temperature rise of current-carrying parts specified in Clause 21 is not determined.
NOTE 101 Thermal controls are not allowed in connectors complying with the standard sheets of IEC 60320-1.
25 Supply connection and external flexible cords
This clause of Part 1 is applicable except as follows.
25.1 Addition:
Appliances incorporating an appliance inlet that does not comply with the standard sheets of
IEC 60320-1 shall be supplied with a cord set.
25.7 Addition:
Light polyvinyl chloride sheathed cord (code designation 60227 IEC 52) is allowed,
irrespective of the mass of the appliance.

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26 Terminals for external conductors
This clause of Part 1 is applicable.
27 Provision for earthing
This clause of Part 1 is applicable.
28 Screws and connections
This clause of Part 1 is applicable.
29 Clearances, creepage distances and solid insulation
This clause of Part 1 is applicable.
30 Resistance to heat and fire
This clause of Part 1 is applicable except as follows.
30.2.2 Not applicable.
31 Resistance to rusting
This clause of Part 1 is applicable.
32 Radiation, toxicity and similar hazards
This clause of Part 1 is applicable.
B
A
E
C
D
IEC
Key
A adhesive
B thermocouple wires 0,3 mm diameter according to IEC 60584-1 Type K (chrome alumel)
C handle arrangement permitting a contact force of 4 N ± 1 N
D polycarbonate tube: inside diameter 3 mm, outside diameter 5 mm
E tinned copper disc: 5 mm diameter, 0,5 mm thick with flat contact face
Figure 101 – Probe for measuring surface temperatures

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Annexes
The annexes of Part 1 are applicable.

Bibliography
The bibliography of Part 1 is applicable.

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SOMMAIRE
AVANT-PROPOS . 19
INTRODUCTION . 22
1 Domaine d'application . 23
2 Références normatives . 24
3 Définitions . 24
4 Exigences générales . 24
5 Conditions générales d'essais . 24
6 Classification . 24
7 Marquage et instructions . 24
8 Protection contre l'accès aux parties actives . 26
9 Démarrage des appareils à moteur . 26
10 Puissance et courant . 26
11 Echauffements . 26
12 Vacant . 27
13 Courant de fuite et rigidité diélectrique à la température de régime . 27
14 Surtensions transitoires . 28
15 Résistance à l'humidité . 28
16 Courant de fuite et rigidité diélectrique . 29
17 Protection contre la surcharge des transformateurs et des circuits associés . 29
18 Endurance . 29
19 Fonctionnement anormal . 29
20 Stabilité et dangers mécaniques . 29
21 Résistance mécanique . 29
22 Construction . 30
23 Conducteurs internes . 30
24 Composants . 30
25 Raccordement au réseau et câbles souples extérieurs . 31
26 Bornes pour conducteurs externes . 31
27 Dispositions en vue de la mise à la terre . 31
28 Vis et connexions .
...