IEC 61156-15:2024

IEC 61156-15 ®
Edition 1.0 2024-08
INTERNATIONAL
STANDARD
Multicore and symmetrical pair/ quad cables for digital communications –
Part 15: Symmetrical pair/quad cables for horizontal floor wiring with
transmission characteristics up to 1 000 MHz and resistance to fire performance
characteristics – Sectional specification

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IEC 61156-15 ®
Edition 1.0 2024-08
INTERNATIONAL
STANDARD
Multicore and symmetrical pair/ quad cables for digital communications –

Part 15: Symmetrical pair/quad cables for horizontal floor wiring with

transmission characteristics up to 1 000 MHz and resistance to fire performance

characteristics – Sectional specification

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 33.120.20  ISBN 978-2-8322-9555-7

– 2 – IEC 61156-15:2024 © IEC 2024
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 8
4 Installation considerations . 8
5 Materials and cable construction . 9
6 Characteristics and requirements . 9
6.1 General remarks . 9
6.2 Electrical characteristics and tests . 9
6.2.1 Conductor resistance . 9
6.2.2 Resistance unbalance. 9
6.2.3 Dielectric strength . 9
6.2.4 Insulation resistance . 9
6.2.5 Mutual capacitance . 9
6.2.6 Capacitance unbalance . 9
6.2.7 Transfer impedance . 9
6.2.8 Coupling attenuation . 9
6.2.9 Current-carrying capacity . 9
6.3 Transmission characteristics . 10
6.3.1 Velocity of propagation (phase velocity) . 10
6.3.2 Phase delay and differential delay (delay skew) . 10
6.3.3 Attenuation (α) . 10
6.3.4 Unbalance attenuation (TCL) . 10
6.3.5 Near-end crosstalk (NEXT) . 10
6.3.6 Far-end crosstalk (ACR-F) . 10
6.3.7 Alien (exogenous) near-end crosstalk (ANEXT) . 10
6.3.8 Alien (exogenous) far-end crosstalk (AACR-F) . 10
6.3.9 Alien (exogenous) crosstalk of bundled cables . 10
6.3.10 Impedance . 10
6.3.11 Return loss (RL) . 10
6.4 Mechanical and dimensional characteristics and requirements . 11
6.4.1 Dimensional requirements . 11
6.4.2 Elongation at break of the conductors . 11
6.4.3 Tensile strength of the insulation . 11
6.4.4 Elongation at break of the insulation . 11
6.4.5 Adhesion of the insulation to the conductor . 11
6.4.6 Elongation at break of the sheath . 11
6.4.7 Tensile strength of the sheath . 11
6.4.8 Crush test of the cable . 11
6.4.9 Impact test of the cable . 11
6.4.10 Bending under tension . 11
6.4.11 Repeated bending of the cable . 11
6.4.12 Tensile performance of the cable . 11
6.4.13 Shock-test requirements of the cable . 11
6.4.14 Bump-test requirements of the cable . 11

6.4.15 Vibration-test requirements of a cable . 12
6.5 Environmental characteristics . 12
6.5.1 Shrinkage of insulation . 12
6.5.2 Wrapping test of insulation after thermal ageing . 12
6.5.3 Bending test of insulation at low temperature . 12
6.5.4 Elongation at break of the sheath after ageing . 12
6.5.5 Tensile strength of the sheath after ageing . 12
6.5.6 Sheath pressure test at high temperature . 12
6.5.7 Cold bend test of the cable . 12
6.5.8 Heat shock test . 12
6.5.9 Damp heat steady state . 12
6.5.10 Solar radiation (UV test) . 12
6.5.11 Solvents and contaminating fluids . 12
6.5.12 Salt mist and sulphur dioxide . 12
6.5.13 Water immersion . 12
6.5.14 Hygroscopicity . 13
6.5.15 Wicking. 13
6.5.16 Flame propagation characteristics of a single cable . 13
6.5.17 Flame propagation characteristics of bunched cables . 13
6.5.18 Halogen gas evolution . 13
6.5.19 Smoke generation . 13
6.5.20 Toxic gas emission . 13
6.5.21 Integrated fire test . 13
7 Fire resistance/resistance to fire . 13
7.1 Test of sample 1 – Circuit integrity . 13
7.2 Test of sample 2 – Transmission integrity . 14
7.2.1 General remarks . 14
7.2.2 Sample preparation . 14
7.2.3 Checking arrangement . 14
7.2.4 Measurements of the transmission characteristics under fire . 14
7.2.5 Performance requirement . 15
7.2.6 Retest procedure . 16
8 Test report . 16
9 Bundled cables requirements . 16
10 Introduction to the blank detail specification . 16
Annex A (informative) Blank detail specification . 17
Bibliography . 22

Table 1 – parameters . 15

– 4 – IEC 61156-15:2024 © IEC 2024
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
MULTICORE AND SYMMETRICAL PAIR/ QUAD CABLES
FOR DIGITAL COMMUNICATIONS –
Part 15: Symmetrical pair/quad cables for horizontal floor wiring with
transmission characteristics up to 1 000 MHz and resistance to fire
performance characteristics – Sectional 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
...