IEC 61156-11:2019

Multicore and symmetrical pair/quad cables for digital communications - Part 11: Symmetrical single pair cables with transmission characteristics up to 600 MHz - Horizontal floor wiring - Sectional specification

IEC 61156-11:2019 describes cables intended to be used for transmission of 1 Gbps over a single twisted pair for office, home and industrial application. An example of existing application is 1000BASE-T1, see ISO/IEC TR 11801-9906. The transmission characteristics of these cables are specified up to a frequency of 600 MHz and at a temperature of 20 °C. The cable type recognised is intended to be used for shielded channels with a nominal length of 40 m. Possible designs are U/FTP, X/UTP and X/FTP, where X stands for F, S or SF. A blank detail specification can be found in Annex A. These cables can comprise more than one pair in the event that several systems are operated in parallel. In this case, refer to Clause 7 of this document. 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.

General Information

• Status: Published
• Publication Date: 05-May-2019
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 33.120.20 - Wires and symmetrical cables
• Technical Committee: SC 46C - Wires and symmetric cables
• Drafting Committee: WG 7 - TC 46/SC 46C/WG 7
• Current Stage: DELPUB - Deleted Publication
• Start Date: 26-Feb-2021
• Completion Date: 02-May-2023

Relations

• Revised: IEC 61156-11:2023 - Multicore and symmetrical pair/quad cables for digital communications - Part 11: Symmetrical single pair cables with transmission characteristics up to 1,25 GHz - Horizontal floor wiring - Sectional specification
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 61156-11 ®
Edition 1.0 2019-05
INTERNATIONAL
STANDARD
Multicore and symmetrical pair/quad cables for digital communications –
Part 11: Symmetrical single pair cables with transmission characteristics
up to 600 MHz – Horizontal floor wiring – Sectional specification

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IEC 61156-11 ®
Edition 1.0 2019-05
INTERNATIONAL
STANDARD
Multicore and symmetrical pair/quad cables for digital communications –

Part 11: Symmetrical single pair cables with transmission characteristics

up to 600 MHz – Horizontal floor wiring – Sectional specification

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 33.120.20 ISBN 978-2-8322-6678-6

– 2 – IEC 61156-11:2019 © IEC 2019

CONTENTS
FOREWORD . 5
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 8
4 Installation considerations . 8
4.1 General remarks . 8
4.2 Bending radius of installed cable. 8
4.3 Climatic conditions . 8
5 Materials and cable construction . 8
5.1 General remarks . 8
5.2 Cable construction . 9
5.3 Conductor . 9
5.4 Insulation . 9
5.5 Cable element . 9
5.6 Screening of the cable element . 9
5.7 Cable make-up. 9
5.8 Screening of the cable core . 9
5.9 Sheath . 9
5.10 Identification . 10
5.11 Finished cable . 10
6 Characteristics and requirements . 10
6.1 General remarks . 10
6.2 Electrical characteristics and tests . 10
6.2.1 Conductor resistance . 10
6.2.2 Resistance unbalance. 10
6.2.3 Dielectric strength . 11
6.2.4 Insulation resistance . 11
6.2.5 Mutual capacitance . 11
6.2.6 Capacitance unbalance . 11
6.2.7 Transfer impedance . 11
6.2.8 Coupling attenuation . 11
6.2.9 Current-carrying capacity . 12
6.3 Transmission characteristics . 12
6.3.1 Velocity of propagation (phase velocity) . 12
6.3.2 Phase delay and differential delay (delay skew) . 12
6.3.3 Attenuation (α) . 12
6.3.4 Unbalance attenuation (TCL and EL TCTL) . 13
6.3.5 Alien (exogenous) near-end crosstalk (PS ANEXT) . 13
6.3.6 Alien (exogenous) far-end crosstalk (PS AACR-F) . 14
6.3.7 Alien (exogenous) crosstalk of bundled cables . 14
6.3.8 Impedance . 14
6.3.9 Return loss (RL) . 14
6.4 Mechanical and dimensional characteristics and requirements . 15
6.4.1 Dimensional requirements . 15
6.4.2 Elongation at break of the conductor. 15
6.4.3 Tensile strength of the insulation . 15

6.4.4 Elongation at break of the insulation . 15
6.4.5 Adhesion of the insulation to the conductor . 15
6.4.6 Elongation at break of the sheath . 15
6.4.7 Tensile strength of the sheath . 15
6.4.8 Crush test of the cable . 15
6.4.9 Impact test of the cable . 15
6.4.10 Bending under tension . 16
6.4.11 Repeated bending of the cable . 16
6.4.12 Tensile performance of the cable . 16
6.4.13 Shock-test requirements of the cable . 16
6.4.14 Bump-test requirements of the cable . 16
6.4.15 Vibration-test requirements of a cable . 16
6.5 Environmental characteristics . 16
6.5.1 Shrinkage of the insulation . 16
6.5.2 Wrapping test of the insulation after thermal ageing . 16
6.5.3 Bending test of insulation at low temperature . 16
6.5.4 Elongation at break of the sheath after ageing . 16
6.5.5 Tensile strength of the sheath after ageing . 16
6.5.6 Sheath pressure test at high temperature . 16
6.5.7 Cold bend test of the cable . 17
6.5.8 Heat shock test . 17
6.5.9 Damp heat steady state . 17
6.5.10 Solar radiation . 17
6.5.11 Solvents and contaminating fluids . 17
6.5.12 Salt mist and sulphur dioxide . 17
6.5.13 Water immersion . 17
6.5.14 Hygroscopicity . 17
6.5.15 Wicking. 17
6.5.16 Flame propagation characteristics of a single cable . 17
6.5.17 Flame propagation characteristics of bunched cables . 17
6.5.18 Halogen gas evolution . 17
6.5.19 Smoke generation . 18
6.5.20 Toxic gas emission . 18
6.5.21 Integrated fire test method for cables in environmental air handling
spaces . 18
7 Bundled cable requirements . 18
7.1 General . 18
7.2 Single pairs sharing one sheath . 18
7.2.1 General . 18
7.2.2 Near-end crosstalk (NEXT) . 18
7.2.3 Attenuation to crosstalk ratio far-end (PS ACR-F) . 19
Annex A (informative) Blank Detail Specification . 20
Bibliography . 25

Table 1 – Transfer impedance . 11
Table 2 – Coupling attenuation . 12
Table 3 – Attenuation equation constants . 13
Table 4 – TCL requirements . 13

– 4 – IEC 61156-11:2019 © IEC 2019
Table 5 – EL TCTL requirements . 13
Table 6 – PS ANEXT requirements . 14
Tab
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