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

IEC 61156-1 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. It is also applicable to cables used for customer premises wiring. 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 est applicable aux systèmes de transmission tels que le RNIS (ISDN), les réseaux locaux et les systèmes de transmissions de données, et spécifie les définitions, les exigences et les méthodes d'essai des câbles multiconducteurs, à paires symétriques et à quartes. Elle est aussi applicable aux câbles utilisés pour le câblage des locaux des clients. Le contenu du corrigendum d'août 2015 a été pris en considération dans cet exemplaire.

General Information

Status
Published
Publication Date
05-Jun-2007
Current Stage
PPUB - Publication issued
Completion Date
06-Jun-2007
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IEC 61156-1:2007 - Multicore and symmetrical pair/quad cables for digital communications - Part 1: Generic specification
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IEC 61156-1
Edition 3.0 2007-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
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
---------------------- Page: 1 ----------------------
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---------------------- Page: 2 ----------------------
IEC 61156-1
Edition 3.0 2007-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
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
CODE PRIX
ICS 33.120.20 ISBN 2-8318-9638-X
® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 3 ----------------------
– 2 – 61156-1 © IEC:2007
CONTENTS

FOREWORD...........................................................................................................................5

1 Scope...............................................................................................................................7

2 Normative references .......................................................................................................7

3 Terms and definitions .......................................................................................................9

4 Installation considerations ..............................................................................................12

5 Materials and cable construction ....................................................................................12

5.1 General remarks....................................................................................................12

5.2 Cable construction ................................................................................................12

5.2.1 Conductor..................................................................................................13

5.2.2 Insulation...................................................................................................13

5.2.3 Cable element ...........................................................................................13

5.2.4 Cable make-up ..........................................................................................14

5.2.5 Screening of the cable core .......................................................................14

5.2.6 Sheath.......................................................................................................14

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 .....................................................................................16

6.2.4 Insulation resistance..................................................................................16

6.2.5 Mutual capacitance....................................................................................17

6.2.6 Capacitance unbalance to earth ................................................................17

6.2.7 Transfer impedance...................................................................................17

6.2.8 Coupling attenuation..................................................................................17

6.2.9 Current-carrying capacity...........................................................................17

6.3 Transmission characteristics .................................................................................18

6.3.1 Velocity of propagation (phase velocity) ....................................................18

6.3.2 Phase delay and differential delay (delay skew) ........................................18

6.3.3 Attenuation ................................................................................................19

6.3.4 Unbalance attenuation...............................................................................21

6.3.5 Near-end crosstalk ....................................................................................26

6.3.6 Far-end crosstalk.......................................................................................28

6.3.7 Alien (exogenous) near-end crosstalk........................................................31

6.3.8 Alien (exogenous) far-end crosstalk...........................................................35

6.3.9 Alien (exogenous) crosstalk of bundled cables ..........................................35

6.3.10 Mean characteristic impedance and input impedance ................................36

6.3.11 Return loss ................................................................................................37

6.4 Mechanical and dimensional characteristics and requirements ..............................38

6.4.1 Measurement of dimensions ......................................................................38

6.4.2 Elongation at break of the conductor .........................................................38

6.4.3 Tensile strength of the insulation ...............................................................38

6.4.4 Elongation at break of the insulation..........................................................38

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61156-1 © IEC:2007 – 3 –

6.4.5 Adhesion of the insulation to the conductor ...............................................38

6.4.6 Elongation at break of the sheath ..............................................................38

6.4.7 Tensile strength of the sheath ...................................................................38

6.4.8 Crush test of the cable ..............................................................................38

6.4.9 Impact test of the cable .............................................................................39

6.4.10 Bending under tension...............................................................................39

6.4.11 Repeated bending of the cable ..................................................................41

6.4.12 Tensile performance of the cable...............................................................43

6.4.13 Shock test of the cable ..............................................................................43

6.4.14 Bump test of the cable...............................................................................43

6.4.15 Vibration test of the cable..........................................................................43

6.5 Environmental characteristics................................................................................43

6.5.1 Shrinkage of the insulation ........................................................................43

6.5.2 Wrapping test of the insulation after thermal ageing ..................................43

6.5.3 Bending test of the insulation at low temperature.......................................43

6.5.4 Elongation at break of the sheath after ageing...........................................43

6.5.5 Tensile strength of the sheath after ageing ................................................43

6.5.6 Sheath pressure test at high temperature ..................................................44

6.5.7 Cold bend test of the cable ........................................................................44

6.5.8 Heat shock test..........................................................................................44

6.5.9 Damp heat steady state.............................................................................44

6.5.10 Solar radiation ...........................................................................................45

6.5.11 Solvents and contaminating fluids..............................................................45

6.5.12 Salt mist and sulphur dioxide.....................................................................45

6.5.13 Water immersion .......................................................................................45

6.5.14 Hygroscopicity...........................................................................................45

6.5.15 Wicking .....................................................................................................45

6.5.16 Flame propagation characteristics of a single cable...................................46

6.5.17 Flame propagation characteristics of bunched cables ................................46

6.5.18 Halogen gas evolution ...............................................................................46

6.5.19 Smoke generation .....................................................................................46

6.5.20 Toxic gas emission ....................................................................................46

6.5.21 Integrated fire test method for cables in environmental air handling

spaces.......................................................................................................46

Bibliography..........................................................................................................................47

Figure 1 – Test set-up for the measurement of attenuation, velocity of propagation and

phase delay ..........................................................................................................................19

Figure 2 – Test set-up for the measurement of the differential-mode loss of the baluns ........23

Figure 3 – Test set-up for the measurement of the common-mode loss of the baluns............23

Figure 4 – Test set-up for unbalance attenuation at near end (TCL)......................................25

Figure 5 – Test set-up for unbalance attenuation at far end (TCTL) ......................................25

Figure 6 – Test set-up for near-end crosstalk........................................................................27

Figure 7 – Test set-up for far-end crosstalk...........................................................................29

Figure 8 – Test set-up for alien (exogenous) near-end crosstalk ...........................................32

Figure 9 – Test assembly cross-section; six cables around one cable ...................................34

Figure 10 – Test assembly layout; six cables around one cable ............................................34

---------------------- Page: 5 ----------------------
– 4 – 61156-1 © IEC:2007

Figure 11 – Test assembly cross-section; four parallel cables...............................................35

Figure 12 – Test assembly on drum; four parallel cables.......................................................35

Figure 13 – Test set-up for mean characteristic impedance, input impedance and

return loss ............................................................................................................................36

Figure 14 – U-bend test configuration ...................................................................................40

Figure 15 – S-bend test configuration ...................................................................................40

Figure 16 – Repeated bending test configuration ..................................................................42

Figure 17 – Wicking test configuration ..................................................................................46

Table 1 – Test balun performance characteristics .................................................................22

---------------------- Page: 6 ----------------------
61156-1 © IEC:2007 – 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 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 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 third edition cancels and replaces the second edition published in 2002 and it includes its

Corrigendum 1 (2004) This edition constitutes a technical revision.

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.
---------------------- Page: 7 ----------------------
– 6 – 61156-1 © IEC:2007

This bilingual version, published in 2008-03, corresponds to the English version.

The text of this standard is based on the second edition, its Amendment 3 and on the

following documents:
FDIS Report on voting
46C/815/FDIS 46C/823/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.

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 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.
The contents of the corrigendum of August 2015 have been included in this copy.
---------------------- Page: 8 ----------------------
61156-1 © IEC:2007 – 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 –

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
_____________
There exists a 2007 edition of 60189-1.
---------------------- Page: 9 ----------------------
– 8 – 61156-1 © IEC:2007

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

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 – 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 in phase delay between any two pairs in the cable
NOTE Differential phase delay (skew) is expressed in s.
3.7
attenuation

decrease in magnitude of power of a signal that propagates along a pair of a cable

NOTE Attenuation is expressed in dB/m.
---------------------- Page: 11 ----------------------
– 10 – 61156-1 © IEC:2007
3.8
unbalance attenuation

magnitude of power of a signal that propagates between the common-mode circuit and the

differential-mode circuit of a cable
NOTE Unbalance attenuation is expressed in dB.
3.9
...

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