IEC 61156-4:2009
(Main)Multicore and symmetrical pair/quad cables for digital communications - Part 4: Riser cables - Sectional specification
Multicore and symmetrical pair/quad cables for digital communications - Part 4: Riser cables - Sectional specification
IEC 61156-4:2009(E) is a sectional specification and relates to IEC 61156-1:2002. The cables are specifically intended for riser wiring up to category 5 (class D) as defined and specified in ISO/IEC 11801:1995. It defines individually screened or unscreened pairs/quads cables, with or without overall common screen. When installed vertically extra length requirements may be applicable and are defined in the relevant specifications. This edition constitutes a technical revision. The main changes can be found in subclauses 3.3.1.2, 3.3.2, 3.3.4, 3.3.5, 3.3.5.1, 3.3.5.2, 3.3.6 and 3.4. This publication is to be read in conjunction with IEC 61156-1:2002.
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IEC 61156-4 ®
Edition 3.0 2009-05
INTERNATIONAL
STANDARD
Multicore and symmetrical pair/quad cables for digital communications –
Part 4: Riser cables – Sectional specification
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IEC 61156-4 ®
Edition 3.0 2009-05
INTERNATIONAL
STANDARD
Multicore and symmetrical pair/quad cables for digital communications –
Part 4: Riser cables – Sectional specification
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
P
ICS 33.120.20 ISBN 978-2-88910-422-2
– 2 – 61156-4 © IEC:2009(E)
CONTENTS
FOREWORD.4
1 General .6
1.1 Scope.6
1.2 Normative references .6
1.3 Installation considerations.6
2 Definitions, materials and cable construction.7
2.1 Definitions .7
2.2 Materials and cable construction.7
2.2.1 General remarks.7
2.2.2 Cable construction .7
2.2.3 Conductor.7
2.2.4 Insulation.7
2.2.5 Colour code of insulation.7
2.2.6 Cable element .7
2.2.7 Screening of the cable element .7
2.2.8 Cable make-up .8
2.2.9 Screening of the cable core.8
2.2.10 Sheath.8
2.2.11 Colour of sheath .8
2.2.12 Identification .8
2.2.13 Finished cable .8
3 Characteristics and requirements.9
3.1 General remarks.9
3.2 Electrical characteristics .9
3.2.1 Conductor resistance .9
3.2.2 Resistance unbalance.9
3.2.3 Dielectric strength.9
3.2.4 Insulation resistance .9
3.2.5 Mutual capacitance .9
3.2.6 Capacitance unbalance.9
3.2.7 Transfer impedance.9
3.3 Transmission characteristics.10
3.3.1 Velocity of propagation (phase velocity) .10
3.3.2 Attenuation .10
3.3.3 Unbalance attenuation .11
3.3.4 Near-end crosstalk (NEXT) .11
3.3.5 Far-end crosstalk (FEXT).11
3.3.6 Characteristic impedance.12
3.3.7 Structural Return Loss (SRL) .13
3.4 Mechanical and dimensional characteristics and requirements .13
3.4.1 Dimensional requirements.13
3.4.2 Elongation at break of the conductors .13
3.4.3 Elongation at break of the insulation.13
3.4.4 Elongation at break of the sheath.13
3.4.5 Tensile strength of the sheath .13
61156-4 © IEC:2009(E) –3 –
3.4.6 Crush test of the cable.13
3.4.7 Impact test of the cable.13
3.4.8 Repeated bending of the cable.13
3.4.9 Tensile performance of the cable .13
3.5 Environmental characteristics .14
3.5.1 Shrinkage of insulation.14
3.5.2 Wrapping test of insulation after thermal ageing .14
3.5.3 Bending test of insulation at low temperature .14
3.5.4 Elongation at break of the sheath after ageing.14
3.5.5 Tensile strength of the sheath after ageing.14
3.5.6 Sheath pressure test at high temperature.14
3.5.7 Cold bend test of the cable .14
3.5.8 Heat shock test.14
3.5.9 Flame propagation characteristics of a single cable.14
3.5.10 Flame propagation characteristics of bunched cables.14
3.5.11 Acid gas evolution.14
3.5.12 Smoke generation.14
3.5.13 Toxic gas emission .15
3.5.14 Combined flame and smoke test for cables in environmental air
handling space .15
4 Introduction to the blank detail specification .15
Table 1 – constants.11
Table 2 – NEXT, PSNEXT constants .11
Table 3 – EL FEXT, IO FEXT values .12
Table 4 – Input impedance values .12
Table 5 – Function fitted impedance .12
Table 6 – Structural return loss (dB min) .13
– 4 – 61156-4 © IEC:2009(E)
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
MULTICORE AND SYMMETRICAL PAIR/QUAD CABLES
FOR DIGITAL COMMUNICATIONS –
Part 4: Riser cables –
Sectional specification
FOREWORD
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International Standard IEC 61156-4 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.
This standard is to be read in conjunction with IEC 61156-1: 2002.
This third edition cancels and replaces the second e
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