IEC 61156-15:2024
(Main)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
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
IEC 61156-15:2024 refers to cables as described in IEC 61156-5:2020 or cables containing element(s) from cables as described in IEC 61156-5 which are required to maintain both circuit integrity and data transmission capability before, during and after flame application under specified conditions.
In addition to the basic cable construction, it describes the means of sample preparation, checking arrangements and gives the performance requirements, means to evaluate the data transmission capability during and after subjecting to fire, and gives means for evaluating test results and the parameters that are specified in the detail specification.
The cables covered by this document are intended to operate with voltages and currents normally encountered in communication systems. While these cables are not intended to be used in conjunction with low impedance sources, for example the electric power supplies of public utility mains, they are intended to be used to support the delivery of low voltage remote powering applications and have no rated voltage and are used for extra low voltage circuits.
For the purpose of this document, fire conditions as currently listed in IEC 60331-23:1999 and basic test apparatus as per IEC 60331-11:1999 apply.
As the test method according to IEC 60331-23:1999 will not be developed further, other test methods could be used or added in future editions of this document.
IEC 60331-1 and IEC 60331-2 will be added in a future revision as the standard tests for circuit integrity and the test rig to be used for all testing.
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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
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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
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Standardization (ISO) in
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