R020-001:2001

SLOVENSKI STANDARD
SIST R020-001:2002
01-september-2002
Compression and mechanical connectors for power cables with copper or
aluminium conductors - Compression terminal lugs for power cables to fit
equipment up to and including 1 kV - Overall dimensions
Compression and mechanical connectors for power cables with copper or aluminium
conductors - Compression terminal lugs for power cables to fit equipment up to and
including 1 kV - Overall dimensions
Ta slovenski standard je istoveten z: R020-001:2001
ICS:
29.120.20 Spojni elementi Connecting devices
SIST R020-001:2002 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST R020-001:2002

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SIST R020-001:2002
CENELEC R020-001
REPORT November 2001
English version
Compression and mechanical connectors for power cables
with copper or aluminium conductors –
Compression terminal lugs for power cables to fit equipment
up to and including 1 kV –
Overall dimensions
This CENELEC Report has been prepared by TC 20, Electric cables. It was approved by TC 20 on
2001-05-11 and endorsed by the CENELEC Technical Board on 2001-07-03.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Czech Republic,
Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands,
Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Central Secretariat: rue de Stassart 35, B - 1050 Brussels
© 2001 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. R020-001:2001 E

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SIST R020-001:2002
R020-001:2001 - 2 -
Foreword
This CENELEC Report was prepared by the CENELEC Technical Committee TC 20,
Electric cables.
It was approved by TC 20 on 2001-05-11 and endorsed by the CENELEC Technical Board
on 2001-07-03.
Contents
Page
Introduction . 3
1 Scope. 4
2 Normative references. 4
3 Definitions . 5
4 Requirements. 6
Figure
1 Space requirement of terminal lug . 7

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SIST R020-001:2002
- 3 - R020-001:2001
Introduction
When using apparatus and switchgear for low voltage, the space needed for
installation of a cable is always a problem. The manufacturer wants to make the
apparatus as small as possible to save space and material to get a lower cost. The
user wants to have an easy installation of the cable and sometimes also wants to
install a larger cable size than necessary to decrease power losses in the cable.
The connection of terminal lugs on the cable is also a special problem. The user
may want to install any terminal lug found on the market, which he is at liberty to
do, providing there is appropriate installation tooling available. The manufacturer of
equipment should in this case design his apparatus so that the largest terminal lug
on the market can be installed. On the other hand, the apparatus can be designed
for the smallest lug available on the market forcing the user to buy this for the
installation, perhaps using a special tool.
This Report specifies overall installed maximum dimensions to serve mainly as a
guide for dimensioning of cable termination enclosures. The reasons for not giving
all dimensions of the lug are:
a) an apparatus manufacturer must know the overall dimensions needed in the
apparatus for a certain cable size and application. There is no real use for all
dimensions specified for a lug;
b) to specify all dimensions is to develop a new terminal lug or compression
system, which is not the purpose of this Report. Further technical development
of terminal lugs will also be difficult with too many dimensional restrictions;
c) there is a wide range of mounting holes of the palm on the market, but only one
mounting hole is given for each conductor size. The given mounting holes are
chosen small, because for the same tightening torque, the force from a small
size of bolt is higher than the force from a larger one. The ability to apply a
large torque on a terminal lug is limited in switchgear due to the limited space.
The mechanical strength for the apparatus can also be a limiting factor.
Information about the tables
Table 1 gives the maximum overall installed dimensions for cables with aluminium
conductors fitted with aluminium or bimetallic lugs. Preferred mounting bolts are
listed. Other hole sizes can be used as long as they fulfil the other requirements of
this Report.
Table 2 gives the maximum overall installed dimensions for cables with copper
conductors fitted with copper lugs. Preferred mount
...