IEC 61156-9:2016

IEC 61156-9 ®
Edition 1.0 2016-04
INTERNATIONAL
STANDARD
Multicore and symmetrical pair/quad cables for digital communications –
Part 9: Cables for channels with transmission characteristics up to 2 GHz –
Sectional specification
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IEC 61156-9 ®
Edition 1.0 2016-04
INTERNATIONAL
STANDARD
Multicore and symmetrical pair/quad cables for digital communications –

Part 9: Cables for channels with transmission characteristics up to 2 GHz –

Sectional specification
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 33.120.20 ISBN 978-2-8322-3350-4

– 2 – IEC 61156-9:2016 © IEC 2016

CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references. 6
3 Terms and definitions . 7
4 Installation considerations. 7
5 Materials and cable construction . 7
6 Characteristics and requirements . 7
6.1 General remarks . 7
6.2 Electrical characteristics and tests . 8
6.2.1 Conductor resistance . 8
6.2.2 Resistance unbalance . 8
6.2.3 Dielectric strength . 8
6.2.4 Insulation resistance . 8
6.2.5 Mutual capacitance . 8
6.2.6 Capacitance unbalance . 8
6.2.7 Transfer impedance . 8
6.2.8 Coupling attenuation . 8
6.2.9 Current-carrying capacity . 9
6.3 Transmission characteristics . 9
6.3.1 Velocity of propagation (phase velocity) . 9
6.3.2 Phase delay and differential delay (delay skew) . 9
6.3.3 Attenuation (α) . 9
6.3.4 Unbalance attenuation (TCL) . 10
6.3.5 Near-end crosstalk (NEXT) . 10
6.3.6 Far-end crosstalk (ACR-F) . 11
6.3.7 Alien (exogenous) near-end crosstalk (ANEXT) . 11
6.3.8 Alien (exogenous) far-end crosstalk (AFEXT). 12
6.3.9 Alien (exogenous) crosstalk of bundled cables . 12
6.3.10 Impedance . 12
6.3.11 Return loss (RL) . 12
6.4 Mechanical and dimensional characteristics and requirements . 13
6.4.1 Dimensional requirements . 13
6.4.2 Elongation at break of the conductors . 13
6.4.3 Tensile strength of the insulation . 13
6.4.4 Elongation at break of the insulation . 13
6.4.5 Adhesion of the insulation to the conductor . 13
6.4.6 Elongation at break of the sheath . 13
6.4.7 Tensile strength of the sheath . 13
6.4.8 Crush test of the cable . 13
6.4.9 Impact test of the cable . 13
6.4.10 Bending under tension . 13
6.4.11 Repeated bending of the cable . 14
6.4.12 Tensile performance of the cable . 14
6.4.13 Shock-test requirements of the cable . 14
6.4.14 Bump-test requirements of the cable . 14
6.4.15 Vibration-test requirements of a cable . 14

6.5 Environmental characteristics . 14
6.5.1 Shrinkage of insulation . 14
6.5.2 Wrapping test of insulation after thermal ageing . 14
6.5.3 Bending test of insulation at low temperature . 14
6.5.4 Elongation at break of the sheath after ageing . 14
6.5.5 Tensile strength of the sheath after ageing . 14
6.5.6 Sheath pressure test at high temperature . 14
6.5.7 Cold bend test of the cable . 14
6.5.8 Heat shock test . 14
6.5.9 Damp heat steady state. 15
6.5.10 Solar radiation (UV test) . 15
6.5.11 Solvents and contaminating fluids. 15
6.5.12 Salt mist and sulphur dioxide . 15
6.5.13 Water immersion . 15
6.5.14 Hygroscopicity . 15
6.5.15 Wicking . 15
6.5.16 Flame propagation characteristics of a single cable . 15
6.5.17 Flame propagation characteristics of bunched cables. 15
6.5.18 Halogen gas evolution . 15
6.5.19 Smoke generation . 15
6.5.20 Toxic gas emission . 15
6.5.21 Integrated fire test . 15
7 Bundled cables requirements . 16
8 Introduction to the blank detail specification . 16
Bibliography . 17

Table 1 – Coupling attenuation . 9
Table 2 – Attenuation equation constants . 10
Table 3 – TCL requirements . 10
Table 4 – ELTCTL requirements . 10
Table 5 – NEXT and PS NEXT requirements . 11
Table 6 – ACR-F and PS ACR-F requirements . 11
Table 7 – PS ANEXT requirements . 11
Table 8 – PS AACR-F requirements . 12
Table 9 – RL requirements . 12

– 4 – IEC 61156-9:2016 © IEC 2016
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
MULTICORE AND SYMMETRICAL PAIR/QUAD CABLES
FOR DIGITAL COMMUNICATIONS –
Part 9: Cables for channels with transmission characteristics
up to 2 GHz – Sectional specification

FOREWORD
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