SIST EN 62012-1:2004

SLOVENSKI SIST EN 62012-1:2004

STANDARD
april 2004
Multicore and symmetrical pair/quad cables for digital communications to be used in
harsh environments - Part 1: Generic specification (IEC 62012-1:2002)
ICS 33.120.20 Referenčna številka
SIST EN 62012-1:2004(en)
©  Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno

---------------------- Page: 1 ----------------------

EUROPEAN STANDARD EN 62012-1
NORME EUROPÉENNE
EUROPÄISCHE NORM October 2002

ICS 33.120.20


English version


Multicore and symmetrical pair/quad cables for digital communications
to be used in harsh environments
Part 1: Generic specification
(IEC 62012-1:2002)


Câbles multiconducteurs à paires Mehradrige und symmetrische
symétriques et quartes pour transmission paar-/-viererverseilte Kabel
numérique utilisés en environnement für digitale Kommunikation
difficile zur Anwendung in rauher Umgebung
Partie 1: Spécification générique Teil 1: Fachgrundspezifikation
(CEI 62012-1:2002) (IEC 62012-1:2002)






This European Standard was approved by CENELEC on 2002-10-01. CENELEC members are bound to
comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on
application to the Central Secretariat or to any CENELEC member.

This European Standard exists in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CENELEC member into its own language and
notified to the Central Secretariat has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Czech Republic,
Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta,
Netherlands, Norway, Portugal, Slovakia, 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


© 2002 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.

Ref. No. EN 62012-1:2002 E

---------------------- Page: 2 ----------------------

EN 62012-1:2002 - 2 -
Foreword
The text of document 46C/503/FDIS, future edition 1 of IEC 62012-1, prepared by SC 46C, Wires and
symmetric cables, of IEC TC 46, Cables, wires, waveguides, r.f. connectors, r.f. and microwave
passive components and accessories, was submitted to the IEC-CENELEC parallel vote and was
approved by CENELEC as EN 62012-1 on 2002-10-01.
The following dates were fixed:
– latest date by which the EN has to be implemented
 at national level by publication of an identical
 national standard or by endorsement (dop) 2003-07-01
– latest date by which the national standards conflicting
 with the EN have to be withdrawn (dow) 2005-10-01
Annexes designated "normative" are part of the body of the standard.
Annexes designated "informative" are given for information only.
In this standard, annexes A, B and ZA are normative and annexes C and D are informative.
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 62012-1:2002 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards
indicated:
IEC 60811-1-2 NOTE Harmonized as EN 60811-1-2:1995 (not modified).
IEC 60811-3-1 NOTE Harmonized as EN 60811-3-1:1995 (not modified).
IEC 60811-4-1 NOTE Harmonized as EN 60811-4-1:1995 (not modified).
IEC 60811-4-2 NOTE Harmonized as EN 60811-4-2:1999 (modified).
__________

---------------------- Page: 3 ----------------------

- 3 - EN 62012-1:2002
Annex ZA
(normative)

Normative references to international publications
with their corresponding European publications
This European Standard incorporates by dated or undated reference, provisions from other
publications. These normative references are cited at the appropriate places in the text and the
publications are listed hereafter. For dated references, subsequent amendments to or revisions of any
of these publications apply to this European Standard only when incorporated in it by amendment or
revision. For undated references the latest edition of the publication referred to applies (including
amendments).
NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant
EN/HD applies.
Publication Year Title EN/HD Year
IEC 60028 1925 International standard of resistance for - -
copper

1)
IEC 60050-701 - International electrotechnical vocabulary - -
- Chapter 701: Telecommunications,
channels and networks

1)
IEC 60050-704 - Chapter 704: Transmission - -

1)
IEC 60050-722 - Chapter 722: Telephony - -

IEC 60068-2 Series Environmental testing EN 60068-2 Series
Part 2: Tests

IEC 60189-1 1986 Low-frequency cables and wires with - -
PVC insulation and PVC sheath
Part 1: General test and measuring
methods

IEC 60304 1982 Standard colours for insulation for low- HD 402 S2 1984
frequency cables and wires

2)
IEC 60332-1 1993 Tests on electric cables under fire - -
conditions
Part 1: Test on a single vertical
insulated wire or cable

3)
IEC 60332-2 1989 Part 2: Test on a single small vertical HD 405.2 S1 1991
insulated copper wire or cable

4)
IEC 60332-3 Series Part 3: Tests on bunched wires or - 1993
cables


1)
Undated reference.
2)
EN 50265-1:1998 and EN 50265-2-1:1998, which are related to IEC 60332-1:1993, apply.
3)
HD 405.2 S1 is superseded by EN 50265-1:1998 and EN 50265-2-2:1998.
4)
The series EN 50266, which is related to the series IEC 60332-3, applies.

---------------------- Page: 4 ----------------------

EN 62012-1:2002 - 4 -
Publication Year Title EN/HD Year
1) 5)
IEC 60754-1 - Test on gases evolved during - -
combustion of materials from cables
Part 1: Determination of the amount of
halogen acid gas

IEC 60811-1-1 1993 Insulating and sheathing materials of EN 60811-1-1 1995
electric and optical cables - Common
test methods
Part 1-1: General application -
Measurement of thickness and overall
dimensions - Tests for determining the
mechanical properties

6)
IEC 60811-1-3 1985 Common test methods for insulating and HD 505.1.3 S2 1991
sheating materials of electric cables
Part 1: Methods for general application -
Section 3: Methods for determining the
density - Water absorption tests -
Shrinkage test

7)
IEC 60811-1-4 1985 Insulating and sheathing materials of EN 60811-1-4 1995
electric and optical cables - Common
test methods
Part 1-4: General application - Tests at
low temperature

1) 8)
IEC 61034-1 - Measurement of smoke density of - -
cables burning under defined conditions
Part 1: Test apparatus

1) 9)
IEC 61034-2 - Part 2: Test procedure and - -
requirements





5)
EN 50267-1:1998 and EN 50265-7-1:1998, which are related to IEC 60754-1:1994, apply.
6)
HD 505.1.3 S2 is superseded by EN 60811-1-3:1995, which is based on IEC 60811-1-3:1993.
7)
EN 60811-1-4 includes corrigendum May 1986 + A1:1993 to IEC 60811-1-4.
8)
EN 50268-1:1999, which is related to IEC 61034-1:1997, applies.
9)
EN 50268-2:1999, which is related to IEC 61034-2:1997, applies.

---------------------- Page: 5 ----------------------

NORME CEI
INTERNATIONALE
IEC
62012-1
INTERNATIONAL
Première édition
STANDARD
First edition
2002-06
Câbles multiconducteurs à paires symétriques
et quartes pour transmissions numériques
utilisés en environnements sévères –
Partie 1:
Spécification générique
Multicore and symmetrical pair/quad cables
for digital communications to be used in
harsh environments –
Part 1:
Generic specification
© IEC 2004 Droits de reproduction réservés ⎯ Copyright - all rights reserved
Aucune partie de cette publication ne peut être reproduite ni No part of this publication may be reproduced or utilized in any
utilisée sous quelque forme que ce soit et par aucun procédé, form or by any means, electronic or mechanical, including
électronique ou mécanique, y compris la photocopie et les photocopying and microfilm, without permission in writing from
microfilms, sans l'accord écrit de l'éditeur. the publisher.
International Electrotechnical Commission, 3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, Switzerland
Telephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmail@iec.ch Web: www.iec.ch
CODE PRIX
XA
PRICE CODE
Commission Electrotechnique Internationale
International Electrotechnical Commission
ɆɟɠɞɭɧɚɪɨɞɧɚɹɗɥɟɤɬɪɨɬɟɯɧɢɱɟɫɤɚɹɄɨɦɢɫɫɢɹ
Pour prix, voir catalogue en vigueur
For price, see current catalogue

---------------------- Page: 6 ----------------------

62012-1 © IEC:2004 – 3 –
CONTENTS
FOREWORD.7
INTRODUCTION.11
1 General.13
1.1 Scope.13
1.2 Normative references.13
1.3 Definitions.15
1.4 Environmental considerations.15
2 Materials and cable construction .17
2.1 General remarks.17
2.2 Cable construction.17
2.3 Identification.21
2.4 Finished cable.21
3 Test methods.21
3.1 General remarks.21
3.2 Electrical tests.21
3.3 Mechanical and dimensional measurement tests .23
3.4 Environmental tests.31
3.5 Temperature tests.39
3.6 Chemical tests.45
3.7 Radiation tests.47
Annex A (normative) Horizontal integrated fire-test method .55
A.1 Definitions, symbols and abbreviations .55
A.2 Test environment.55
A.3 Test apparatus.55
A.4 Test specimens.73
A.5 Calibration and maintenance of test equipment.75
A.6 Test specimen preparation.85
A.7 Test procedures.87
A.8 Post-test clean-up and inspection .89
A.9 Calculations.91
A.10 Report.97
Annex B (normative) Method for determining suitability of oxygen analysers for making
heat release measurements .99
B.1 General.99
B.2 Procedure.99
B.3 Additional precautions.99
Annex C (informative) Material information list .101
C.1 Analyser.101
C.2 Fire-test chamber.101
C.3 Firebrick.101

---------------------- Page: 7 ----------------------

62012-1 © IEC:2004 – 5 –
C.4 Inside glass panes.101
C.5 Lamp.103
C.6 Recording device.103
C.7 Bi-directional probe.103
C.8 Neutral density filters.103
C.9 Gas calorimeter.103
C.10 Standard insulated conductor (calibration cable).103
Annex D (informative) Brick sizes .105
Bibliography.107
Figure 1 – Fixture for cable crushing test .25
Figure 2 – Bending under tension .27
Figure 3 – Tensile performance measuring apparatus .29
Figure 4 – Example of temperature versus time .45
Figure 5 – Test set up for radiation .51
Figure A.1 – Schematic of the air-inlet chamber.57
Figure A.2 – Schematic of the fire test chamber.61
Figure A.3 – Cross-section of the fire test chamber (Section B-B, Figure A.2) .61
Figure A.4 – Schematic of the exhaust transition .65
Figure A.5 – Smoke measurement system .67
Figure A.6 – Location of exhaust transition, exhaust duct, smoke measurement system
and damper .69
Figure A.7 – Details of ladder cable tray and supports .71
Figure A.8 – Schematic of gas sampling system .73
Figure A.9 – Temperature history of inorganic reinforced cement board at
thermocouple in air (7 m) .81
Table 1 – Requirement for vibration .33
Table 2 – Sock severities.35
Table 3 – Characteristics to be checked versus the frequency range of the application.37
Table 4 – Circuit integrity classes E .39
Table 5 – Total dose/dose rate combinations .53
Table D.1 – Sizes of bricks .105

---------------------- Page: 8 ----------------------

62012-1 © IEC:2004 – 7 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
___________
MULTICORE AND SYMMETRICAL PAIR/QUAD CABLES FOR DIGITAL
COMMUNICATIONS TO BE USED IN HARSH ENVIRONMENTS –
Part 1: Generic specification
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.
International Standard IEC 62012-1 has been prepared by subcommittee 46C: Wires and
symmetric cables, of IEC technical committee 46: Cables, wires, waveguides, RF connectors,
RF and microwave passive components and accessories.
This bilingual version (2004-02) replaces the English version (2002-06).
The text of this standard is based on the following documents:
FDIS RVD
46C/503/FDIS 46C/535/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.
The French version of this standard has not been voted upon.

---------------------- Page: 9 ----------------------

62012-1 © IEC:2004 – 9 –
This standard constitutes Part 1 of the IEC 62012 series, published under the general title
Multicore and symmetrical pair/quad cables for digital communications to be used in harsh
environments.
Part 2 is currently in preparation.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
The committee has decided that the contents of this publication will remain unchanged until
2007. At this date, the publication will be
• reconfirmed;
• withdrawn;
• replaced by a revised edition, or
• amended.

---------------------- Page: 10 ----------------------

62012-1 © IEC:2004 – 11 –
INTRODUCTION
The cables used for customer premises cabling or other IT cabling may have to work in harsh
environments. This can be in case of fire but also due to conditions of installation in industrial
plant. This standard will be supplemented by sectional specifications addressing a particular
function as defined in 1.4. Detail specifications will refer to one or several sectional
specifications depending upon the actual design of the cable.

---------------------- Page: 11 ----------------------

62012-1 © IEC:2004 – 13 –
MULTICORE AND SYMMETRICAL PAIR/QUAD CABLES FOR DIGITAL
COMMUNICATIONS TO BE USED IN HARSH ENVIRONMENTS –
Part 1: Generic specification
1 General
1.1 Scope
This part of IEC 62012 specifies the definitions and test methods, when used in harsh
environment, of symmetrical pair and quad cables used in digital communication systems
such as ISDN, local area networks and data communication systems. This standard gives
guidance concerning the design and testing of these cables.
1.2 Normative references
The following referenced documents are indispensable for the application of this document.
For dated references, only the edition cited applies. For undated references, the latest edition
of the referenced document (including any amendments) applies.
IEC 60028:1925, International standard of resistance for copper
IEC 60050(701), International Electrotechnical Vocabulary (IEV) – Chapter 701: Telecommu-
nications, channels and networks
IEC 60050(704), International Electrotechnical Vocabulary (IEV) – Chapter 704: Transmission
IEC 60050(722), International Electrotechnical Vocabulary (IEV) – Chapter 722: Telephony
IEC 60068-2 (all parts), Environmental testing – Part 2: Tests
IEC 60189-1:1986, Low-frequency cables and wires with PVC insulation and PVC sheath –
Part 1: General test and measuring methods
IEC 60304:1982, Standard colours for insulation for low-frequency cables and wires
IEC 60332-1:1993, Tests on electric cables under fire conditions – Part 1: Test on a single
vertical insulated wire or cable
IEC 60332-2:1989, Tests on electric cables under fire conditions – Part 2: Test on a single
small vertical insulated copper wire or cable
IEC 60332-3 (all parts), Tests on electric cables under fire conditions – Part 3: Tests on
bunched wires or cables
IEC 60754-1, Test on gases evolved during combustion of materials from cables – Part 1:
Determination of the amount of halogen acid gas

---------------------- Page: 12 ----------------------

62012-1 © IEC:2004 – 15 –
IEC 60811-1-1:1993, Common test methods for insulating and sheathing materials of electric
cables – Part 1: Methods for general application – Section 1: Measurement of thickness and
overall dimensions – Tests for determining the mechanical properties
IEC 60811-1-3:1985, Common test methods for insulating and sheathing materials of electric
cables – Part 1: Methods for general application – Section Three: Methods for determining the
density – Water absorption tests – Shrinkage test
IEC 60811-1-4:1985, Common test methods for insulating and sheathing materials of electric
cables – Part 1: Methods for general application – Section Four: Tests at low temperature
IEC 61034-1, Measurement of smoke density of cables burning under defined conditions –
Part 1: Test apparatus
IEC 61034-2, Measurement of smoke density of cables burning under defined conditions –
Part 2: Test procedure and requirements
1.3 Definitions
For the purposes of this document, the definitions given in IEC 60050-701, IEC 60050-704,
IEC 60050-722 and IEC 61156-1 apply.
1.4 Environmental considerations
The cables shall be designed to perform in one or more of the following environmental
condition.
It is the intention of this standard that any cables defined as compliant with one or more of the
categories referred to in definitions of 1.3 shall also be compliant with the electrical,
mechanical and environmental requirement given below when tested in accordance with
Clauses 3 and 4.
1.4.1 Fire resistance
When subjected to fire according to the test described in 3.4.6, the cables shall be capable of
transmitting the expected signal with or without degradation as described in the detail
specification.
1.4.2 Temperature
When subjected to temperature according to the test described in 3.5, the cables shall be
capable of transmitting the expected signal with or without degradation as described in the
detail specification.
1.4.3 Nuclear radiations (αα, ββ, γγ)
αα ββ γγ
When subjected to radiations according to the test described in 3.7, the cables shall be
capable of transmitting the expected signal with or without degradation as described in the
detail specification.
1.4.4 Chemical
When subjected to chemical agents accordingly to the test described in 3.6, the cables shall
be capable of transmitting the expected signal with or without degradation as described in the
detail specification.

---------------------- Page: 13 ----------------------

62012-1 © IEC:2004 – 17 –
2 Materials and cable construction
2.1 General remarks
The choice of materials and cable construction shall be suitable for the intended application
and installation of the cable.
2.2 Cable construction
The cable construction shall be in accordance with the details and dimensions given in the
relevant detail cable specification.
2.2.1 Conductor
The conductor may be either solid or stranded. The solid conductor shall be circular in section
and may be plain or metal-coated. Normally, the solid conductor shall be drawn in one piece.
Joints in the solid conductor are permitted, provided that the tensile strength of a joint is not
less than 85 % of the unjointed solid conductor.
When the conductor consists of annealed copper, it shall be uniform in quality and free from
defects. The properties of the copper shall be in accordance with IEC 60028.
The stranded conductor shall consist of strands circular in section and assembled without
insulation between them by concentric stranding or bunched.
The individual strands of the conductor may be plain or metal-coated.
Normally, the individual strands shall be drawn in one piece. Joints in individual strands are
permitted provided that the tensile strength of a joint is not less than 85 % of the tensile
strength of the unjointed individual strand. Joints in the complete stranded conductor are not
permitted unless allowed and specified in the relevant detail cable specification.
2.2.2 Insulation
Conductor insulation shall be composed of one or more suitable dielectric materials. The
insulation may be solid, cellular or composite (e.g. foam skin)
The insulation shall be continuous, having a thickness as uniform as possible.
The insulation shall be applied to fit closely to the conductor. The stripping properties of the
insulation shall be checked in accordance with the method specified in 3.4 of IEC 60189-1. It
shall be possible to strip the insulation from the conductor easily and without damage to the
conductor.
When required the insulated conductors shall be coloured for
...