IEC 61156-1:2007+AMD1:2009 CSV

Multicore and symmetrical pair/quad cables for digital communications - Part 1: Generic specification

IEC 61156-1:2009, consolidated version, consists of the third edition (2007) and its amendment 1 (2009). 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 3.1 The contents of the corrigendum of August 2015 have been included in this copy.

Câbles multiconducteurs à paires symétriques et quartes pour transmissions numériques - Partie 1: Spécification générique

La CEI 61156-1 :2009, version consolidée, comprend la troisième édition (2007) et son amendement 1 (2009). Le contenu technique de cette version consolidée est donc identique à celui de l'édition de base et à son amendement; cette version a été préparée par commodité pour l'utilisateur. Elle porte le numéro d'édition 3.1. Le contenu du corrigendum d'août 2015 a été pris en considération dans cet exemplaire.

General Information

• Status: Published
• Publication Date: 13-Oct-2009
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 33.120.20 - Wires and symmetrical cables
• Technical Committee: SC 46C - Wires and symmetric cables
• Current Stage: DELPUB - Deleted Publication
• Completion Date: 14-Mar-2023

Standards Content (Sample)

IEC 61156-1
®
Edition 3.1 2009-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Multicore and symmetrical pair/quad cables for digital communications –
Part 1: Generic specification

Câbles multiconducteurs à paires symétriques et quartes pour transmissions
numériques –
Partie 1: Spécification générique
IEC 61156-1:2007+A1:2009

---------------------- Page: 1 ----------------------
THIS PUBLICATION IS COPYRIGHT PROTECTED
Copyright © 2009 IEC, Geneva, Switzerland

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: [e-mail]
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: [e-mail]
Tel.: [phone]
Fax: [phone]


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
Vocabulaire Electrotechnique International en ligne.
ƒ Service Clients: www.iec.ch/webstore/custserv/custserv_entry-f.htm
Si vous désirez nous donner des commentaires sur cette publication ou si vous avez des questions, visitez le FAQ du
Service clients ou contactez-nous:
Email: [e-mail]
Tél.: [phone]
Fax: [phone]

---------------------- Page: 2 ----------------------
IEC 61156-1
®
Edition 3.1 2009-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Multicore and symmetrical pair/quad cables for digital communications –
Part 1: Generic specification

Câbles multiconducteurs à paires symétriques et quartes pour transmissions
numériques –
Partie 1: Spécification générique

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CP
CODE PRIX
ICS 33.120.20 ISBN 978-2-88910-417-8
® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale

---------------------- Page: 3 ----------------------
– 2 – 61156-1 © IEC:2007+A1:2009
CONTENTS
FOREWORD.5
1 Scope.7
2 Normative references .7
3 Terms and definitions .9
4 Installation considerations .12
5 Materials and cable construction .13
5.1 General remarks.13
5.2 Cable construction .13
5.2.1 Conductor.13
5.2.2 Insulation.13
5.2.3 Cable element .14
5.2.4 Cable make-up .14
5.2.5 Screening of the cable core .14
5.2.6 Sheath.15
5.2.7 Identification.15
5.2.8 Finished cable .15
6 Characteristics and requirements .15
6.1 General remarks – Test configurations .15
6.2 Electrical characteristics and tests .16
6.2.1 Conductor resistance.16
6.2.2 Resistance unbalance .16
6.2.3 Dielectric strength .17
6.2.4 Insulation resistance.17
6.2.5 Mutual capacitance.17
6.2.6 Capacitance unbalance .17
6.2.7 Transfer impedance.18
6.2.8 Coupling attenuation.18
6.2.9 Current-carrying capacity.18
6.3 Transmission characteristics .18
6.3.1 Velocity of propagation (phase velocity) .18
6.3.2 Phase delay and differential delay (delay skew) .19
6.3.3 Attenuation .19
6.3.4 Unbalance attenuation.22
6.3.5 Near-end crosstalk .27
6.3.6 Far-end crosstalk.29
6.3.7 Alien (exogenous) near-end crosstalk.32
6.3.8 Alien (exogenous) far-end crosstalk.37
6.3.9 Alien (exogenous) crosstalk of bundled cables .37
6.3.10 Impedance.38
6.3.11 Return loss .39
6.4 Mechanical and dimensional characteristics and requirements .40
6.4.1 Measurement of dimensions .40
6.4.2 Elongation at break of the conductor .40
6.4.3 Tensile strength of the insulation .40
6.4.4 Elongation at break of the insulation.40
6.4.5 Adhesion of the insulation to the conductor .40

---------------------- Page: 4 ----------------------
61156-1 © IEC:2007+A1:2009 – 3 –
6.4.6 Elongation at break of the sheath .40
6.4.7 Tensile strength of the sheath .40
6.4.8 Crush test of the cable .40
6.4.9 Impact test of the cable .40
6.4.10 Bending under tension.40
6.4.11 Repeated bending of the cable .43
6.4.12 Tensile performance of the cable.44
6.4.13 Shock test of the cable .44
6.4.14 Bump test of the cable.44
6.4.15 Vibration test of the cable.44
6.5 Environmental characteristics.44
6.5.1 Shrinkage of the insulation .44
6.5.2 Wrapping test of the insulation after thermal ageing .44
6.5.3 Bending test of the insulation at low temperature.45
6.5.4 Elongation at break of the sheath after ageing.45
6.5.5 Tensile strength of the sheath after ageing .45
6.5.6 Sheath pressure test at high temperature .45
6.5.7 Cold bend test of the cable .45
6.5.8 Heat shock test.46
6.5.9 Damp heat steady state.46
6.5.10 Solar radiation .46
6.5.11 Solvents and contaminating fluids.46
6.5.12 Salt mist and sulphur dioxide.46
6.5.13 Water immersion .46
6.5.14 Hygroscopicity.46
6.5.15 Wicking .47
6.5.16 Flame propagation characteristics of a single cable.48
6.5.17 Flame propagation characteristics of bunched cables .48
6.5.18 Halogen gas evolution .48
6.5.19 Smoke generation .48
6.5.20 Toxic gas emission .48
6.5.21 Integrated fire test method for cables in environmental
air handling spaces .48

Bibliography.49

Figure 1 – Test set-up for the measurement of attenuation, velocity of propagation and
phase delay .20
Figure 2 – Test set-up for the measurement of the differential-mode loss of the baluns .24
Figure 3 – Test set-up for the measurement of the common-mode loss of the baluns.24
Figure 4 – Test set-up for unbalance attenuation at near end (TCL).26
Figure 5 – Test set-up for unbalance attenuation at far end (TCTL) .26
Figure 6 – Test set-up for near-end crosstalk.28
Figure 7 – Test set-up for far-end crosstalk.30
Figure 8 – Test set-up for alien (exogenous) near-end crosstalk .33
Figure 9 – Test assembly cross-section; six cables around one cable .35
Figure 10 – Test assembly layout; six cables around one cable .35

---------------------- Page: 5 ----------------------
– 4 – 61156-1 © IEC:2007+A1:2009
Figure 18 – Schematic diagram representing the position of the 9 cables
on a wooden drum .36
Figure 19 – Arrangement of the cables on the drum.36
Figure 20 – Preparation of one end.37
Figure 13 – Test set-up for characteristic impedance and return loss .38
Figure 14 – U-bend test configuration .41
Figure 15 – S-bend test configuration .42
Figure 16 – Repeated bending test configuration .43
Figure 17 – Wicking test configuration .47

Table 1 – Test balun performance characteristics .23

---------------------- Page: 6 ----------------------
61156-1 © IEC:2007+A1:2009 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

MULTICORE AND SYMMETRICAL PAIR/QUAD CABLES
FOR DIGITAL COMMUNICATIONS –

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 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.
International Standard IEC 61156-1 has been prepared by subcommittee 46C: Wires and
symmetric cables, of IEC technical committee 46: Cables, wires, waveguides, r.f. connectors,
r.f. and microwave passive components and accessories.
The cables are classified in the study of generic cabling for information technology being
produced by ISO/IEC JTC1/SC 25.
This consolidated version of IEC 61156-1 consists of the third edition (2007) [documents
46C/815/FDIS and 46C/823/RVD], its amendment 1 (2009) [documents 46C/897/FDIS and
46C/899/RVD] and its corrigendum 1 (2015-08).
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 3.1.

---------------------- Page: 7 ----------------------
– 6 – 61156-1 © IEC:2007+A1:2009
A vertical line in the margin shows where the base publication has been modified by
amendment 1.
This edition includes the following significant technical changes with respect to the previous
edition:
a) inclusion of definitions and test methods in support of the MICE table in ISO 24702;
b) inclusion of definitions and test methods in support of new cable categories 6 and 7 ;
A A
c) inclusion of definitions in support of PoEP.
This bilingual version (2008-02) replaces the English version.
The French version of this standard has not been voted upon.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
The list of all the parts of the IEC 61156 series, under the general title Multicore and
symmetrical pair/quad cables for digital communication, can be found on the IEC website.
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.

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 publication using a colour printer.

---------------------- Page: 8 ----------------------
61156-1 © IEC:2007+A1:2009 – 7 –
MULTICORE AND SYMMETRICAL PAIR/QUAD CABLES
FOR DIGITAL COMMUNICATIONS –

Part 1: Generic specification



1 Scope
This part of IEC 61156 is applicable to communication systems such as ISDN, local area
networks and data communication systems and specifies the definitions, requirements and
test methods of multicore, symmetrical pair and quad cables.
This standard is also applicable to cables used for customer premises wiring.
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, International standard of resistance for copper
IEC 60050-726, International Electrotechnical Vocabulary (IEV) – Part 726: Transmission
lines and wave guides
IEC 60068-2-1, Environmental testing – Part 2: Tests – Tests A: Cold
IEC 60169-22, Radio-frequency connectors – Part 22: RF two-pole bayonet coupled
connectors for use with shielded balanced cables having twin inner conductors (Type BNO)
IEC 60189-1:1986, Low-frequency cables and wires with PVC insulation and PVC sheath –
)
1
Part 1: General test and measuring methods
IEC 60304, Standard colours for insulation for low-frequency cables and wires
IEC 60332-1-1, Tests on electric and optical fibre cables under fire conditions – Part 1-1: Test
for vertical flame propagation for a single insulated wire or cable – Apparatus
IEC 60332-2-1, Tests on electric and optical fibre cables under fire conditions – Part 2-1: Test
for vertical flame propagation for a single small insulated wire or cable – Apparatus
IEC 60332-3-10, Tests on electric cables under fire conditions – Part 3-10: Test for vertical
flame spread of vertically-mounted bunched wires or cables – Apparatus
IEC 60332-3-24, Tests on electric cables under fire conditions – Part 3-24: Test for vertical
flame spread of vertically-mounted bunched wires or cables – Category C
IEC 60708, Low-frequency cables with polyolefin insulation and moisture barrier polyolefin
sheath
_____________
)
1
There exists a 2007 edition of 60189-1.

---------------------- Page: 9 ----------------------
– 8 – 61156-1 © IEC:2007+A1:2009
IEC 60754-2, Test on gases evolved during combustion of electric cables – Part 2:
Determination of the degree of acidity of gases evolved during the combustion of materials
taken from electric cables by measuring pH and conductivity
IEC 60794-1-2:2003, Optical fibre cables – Part 1-2: Generic specification – Basic optical
cable test procedures
IEC 60811-1-1:1993, Common test methods for insulating and sheathing materials of
electric cables and optical cables – Part 1: Methods for general application – Section 1:
Measurement of thickness and overall dimensions – Tests for determining the mechanical
properties
IEC 60811-1-2:1985, Common test methods for insulating and sheathing materials of
electric and optical cables – Part 1: Methods for general application – Section Two: Thermal
ageing methods
IEC 60811-1-3:1993, Common test methods for insulating and sheathing materials of
electric and optical 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 and optical cables – Part 1: Methods for general application – Section Four: Test at
low temperature
IEC 60811-3-1:1985, Common test methods for insulating and sheathing materials of
electric and optical cables – Part 3: Methods specific to PVC compounds – Section One:
Pressure test at high temperature – Tests for resistance to cracking
IEC 60811-4-2:2004, Insulating and sheathing materials of electric cables – Common test
methods – Part 4-2: Methods specific to polyethylene and polypropylene compounds –
Tensile strength and elongation at break after conditioning at elevated temperature –
Wrapping test after conditioning at elevated temperature – Wrapping test after thermal
ageing in air – Measurement of mass increase – Long-term stability test – Test method for
copper-catalyzed oxidative degradation
IEC 61034 (all parts), Measurement of smoke density of cables burning under defined
conditions
IEC 61196-1-105, Coaxial communication cables – Part 1-105: Electrical test methods –
Test for withstand voltage of cable dielectric
IEC 62012-1:2004, Multicore and symmetrical pair/quad cables for digital communications to
be used in harsh environments – Part 1: Generic specification
IEC 62153-4-3, Metallic communication cables test methods – Part 4-3: Electromagnetic
compatibility (EMC) – Surface transfer impedance – Triaxial method
IEC 62153-4-4, Metallic communication cables test methods – Part 4-4: Electromagnetic
compatibility (EMC) – Shielded screening attenuation, test method for measuring of the
screening attenuation a up to and above 3 GHz
s
IEC 62153-4-5, Metallic communication cables test methods – Part 4-5: Electromagnetic
compatibility (EMC) – Coupling or screening attenuation – Absorbing clamp method
IEC 62255 (all parts), Multicore and symmetrical pair/quad cables for broadband digital
communications (high bit rate digital access telecommunication networks) – Outside plant
cables

---------------------- Page: 10 ----------------------
61156-1 © IEC:2007+A1:2009 – 9 –
ITU-T Recommendation G.117:1996, Transmission aspects of unbalance about earth
ITU-T Recommendation O.9:1999, Measuring arrangements to assess the degree of
unbalance about earth
3 Terms and definitions
For the purposes of this document, the following terms and definitions, as well as those given
in IEC 60050-726, apply.
3.1
resistance unbalance
difference in resistance of the conductors within a pair or one side of a quad or between pairs
or quads
NOTE Resistance unbalance is expressed as a percentage (%).
3.2
capacitance unbalance to earth
arithmetic difference of the capacitance to earth of the conductors of a pair or one side of a
quad
NOTE Capacitance unbalance is expressed in pF/m.
3.3
mutual capacitance
electrical charge storage parameter of a pair of conductors (or with respect to the side of a
quad)
NOTE 1 Mutual capacitance is one of the four primary transmission line parameters: mutual capacitance, mutual
inductance, resistance and conductance.
NOTE 2 Mutual capacitance is expressed in pF/m.
3.4
velocity of propagation (phase velocity)
speed at which a sinusoidal signal propagates on a pair in the cable
NOTE Velocity of propagation is expressed in m/s.
3.5
delay (phase delay)
time duration between the instants that the wave front of a sinusoidal travelling wave, defined
by a specified phase, passes two given points in a cable
NOTE Phase delay is expressed in s/m.
3.6
differential phase delay (skew)
difference i
...