1、 IEC 61156-6 Edition 3.1 2012-12 INTERNATIONAL STANDARD Multicore and symmetrical pair/quad cables for digital communications Part 6: Symmetrical pair/quad cables with transmission characteristics up to 1 000 MHz Work area wiring Sectional specification IEC61156-6:2010+A1:2012(E) colourinsideTHIS PU
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9、e Centre: csciec.ch. IEC 61156-6 Edition 3.1 2012-12 INTERNATIONAL STANDARD Multicore and symmetrical pair/quad cables for digital communications Part 6: Symmetrical pair/quad cables with transmission characteristics up to 1 000 MHz Work area wiring Sectional specification INTERNATIONAL ELECTROTECHN
10、ICAL COMMISSION ICS 33.120.20 ISBN 978-2-8322-0562-4 Registered trademark of the International Electrotechnical Commission Warning! Make sure that you obtained this publication from an authorized distributor. colourinside 2 61156-6 IEC:2010+A1:2012(E) CONTENTS FOREWORD . 4 1 Scope . 6 2 Normative re
11、ferences . 6 3 Terms and definitions . 7 4 Installation considerations 7 4.1 Climatic conditions 7 5 Materials and cable construction 7 5.1 General remarks 7 5.2 Cable construction 7 5.2.1 Conductor 7 5.2.2 Insulation. 7 5.2.3 Cable element . 7 5.2.4 Cable make-up 8 5.2.5 Screening of the cable core
12、 . 8 5.2.6 Sheath . 8 5.2.7 Identification 8 6 Characteristics and requirements . 8 6.1 General remarks 8 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.
13、2.6 Capacitance unbalance . 9 6.2.7 Transfer impedance . 9 6.2.8 Coupling attenuation 10 6.2.9 Current-carrying capacity. 11 6.3 Transmission characteristics . 11 6.3.1 Velocity of propagation (phase velocity) 11 6.3.2 Phase delay and differential delay (delay skew) 11 6.3.3 Attenuation 11 6.3.4 Unb
14、alance attenuation . 12 6.3.5 Near-end crosstalk (NEXT) . 13 6.3.6 Attenuation to crosstalk ratio far end (PS ACR-F) . 13 6.3.7 Alien (exogenous) near end crosstalk 14 6.3.8 Alien (exogenous) far-end crosstalk (AACR-F) . 14 6.3.9 Alien (exogenous) crosstalk of bundled cables 14 6.3.10 Impedance. 14
15、6.3.11 Return loss (RL) 15 6.4 Mechanical and dimensional characteristics and requirements 16 6.4.1 Dimensional requirements . 16 6.4.2 Elongation at break of the conductors 16 6.4.3 Tensile strength of the insulation . 16 6.4.4 Elongation at break of the insulation 16 6.4.5 Adhesion of the insulati
16、on to the conductor . 16 61156-6 IEC:2010+A1:2012(E) 3 6.4.6 Elongation at break of the sheath 16 6.4.7 Tensile strength of the sheath . 16 6.4.8 Crush test of the cable 16 6.4.9 Impact test of the cable . 17 6.4.10 Bending under tension . 17 6.4.11 Repeated bending of the cable 17 6.4.12 Tensile pe
17、rformance of the cable . 17 6.4.13 Shock-test requirements of the cable . 17 6.4.14 Bump-test requirements of the cable . 17 6.4.15 Vibration-test requirements of a cable . 17 6.5 Environmental characteristics 17 6.5.1 Shrinkage of the insulation 17 6.5.2 Wrapping test of the insulation after therma
18、l ageing 17 6.5.3 Bending test of the insulation at low temperature . 17 6.5.4 Elongation at break of the sheath after ageing . 17 6.5.5 Tensile strength of the sheath after ageing 17 6.5.6 Sheath pressure test at high temperature 18 6.5.7 Cold bend test of the cable 18 6.5.8 Heat shock test 18 6.5.
19、9 Damp heat steady state . 18 6.5.10 Solar radiation . 18 6.5.11 Solvents and contaminating fluids 18 6.5.12 Salt mist and sulphur dioxide . 18 6.5.13 Water immersion . 18 6.5.14 Hygroscopicity . 18 6.5.15 Wicking . 18 6.5.16 Flame propagation characteristics of a single cable . 18 6.5.17 Flame prop
20、agation characteristics of bunched cables 18 6.5.18 Halogen gas evolution . 18 6.5.19 Smoke generation . 19 6.5.20 Toxic gas emission 19 6.5.21 Integrated fire test . 19 7 Introduction to the blank detail specification . 19 Bibliography 20 Figure 1 Impedance template . 15 Table 1 Cable categories .
21、6 Table 2 Transfer impedance 10 Table 3 Coupling attenuation . 10 Table 4 Attenuation, constant values . 12 Table 5 Near-end unbalance attenuation 12 Table 6 Worst pair PS NEXT values 13 Table 7 Worst pair PS ACR-F 13 Table 8 PS ANEXT 14 Table 9 PS AACR-F (PS AELFEXT) . 14 Table 10 Return loss 16 4
22、61156-6 IEC:2010+A1:2012(E) INTERNATIONAL ELECTROTECHNICAL COMMISSION _ MULTICORE AND SYMMETRICAL PAIR/QUAD CABLES FOR DIGITAL COMMUNICATIONS Part 6: Symmetrical pair/quad cables with transmission characteristics up to 1 000 MHz Work area wiring Sectional specification FOREWORD 1) The International
23、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 fie
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32、n, this IEC Publication or any other IEC Publications. 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is indispensable for the correct application of this publication. 9) Attention is drawn to the possibility that some of the elements
33、of this IEC Publication may be the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. This consolidated version of IEC 61156-6 consists of the third edition (2010) documents 46C/903/FDIS and 46C/908/RVD and its amendment 1 (2012) documents 46C/
34、955/CDV and 46C/968/RVC. It bears the edition number 3.1. The technical content is therefore identical to the base edition and its amendment and has been prepared for user convenience. A vertical line in the margin shows where the base publication has been modified by amendment 1. Additions and dele
35、tions are displayed in red, with deletions being struck through. 61156-6 IEC:2010+A1:2012(E) 5 International Standard IEC 61156-6 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 c
36、omponents and accessories. This edition includes the following significant technical changes with respect to the previous edition: a) new requirements for new cables Cat6A, Cat7A; b) revised requirements and tests for the cables. This publication has been drafted in accordance with the ISO/IEC Direc
37、tives, Part 2. This standard shall be read in conjunction with IEC 61156-1:2007. The list of all the parts of the IEC 61156 series, under the general title: Multicore and symmetrical pair/quad cables for digital communications, can be found on the IEC website. The committee has decided that the cont
38、ents of the base publication and its amendments will remain unchanged until the stability date indicated on the IEC web site under “http:/webstore.iec.ch“ in the data related to the specific publication. At this date, the publication will be reconfirmed, withdrawn, replaced by a revised edition, or
39、amended. A bilingual version of this publication may be issued at a later date. IMPORTANT The “colour inside” logo on the cover page of this publication indicates that it contains colours which are considered to be useful for the correct understanding of its contents. Users should therefore print th
40、is publication using a colour printer. 6 61156-6 IEC:2010+A1:2012(E) MULTICORE AND SYMMETRICAL PAIR/QUAD CABLES FOR DIGITAL COMMUNICATIONS Part 6: Symmetrical pair/quad cables with transmission characteristics up to 1 000 MHz Work area wiring Sectional specification 1 Scope This part of IEC 61156 ma
41、kes reference to IEC 61156-1. The cables described herein are intended primarily for work area wiring as defined in ISO/IEC 11801 and ISO/IEC 24702. It covers individually screened, common screened and unscreened pairs or quads. The transmission characteristics and the frequency range (see Table 1)
42、of the cables are specified at 20 C. Table 1 Cable categories Cable designation Maximum referenced frequency MHz Category 5e 100 Category 6 250 Category 6A500 Category 7 600 Category 7A1 000 These cables can be used for various communication channels which use as many as four pairs simultaneously. I
43、n this sense, this sectional specification provides the cable characteristics required by system developers to evaluate new systems. The cables covered by this standard are intended to operate with voltages and currents normally encountered in communication systems. These cables are not intended to
44、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 and power applications such as IEEEs 802.3af (Power over Ethernet) and 802.3at (Power over Ethernet Plus). 2 Normati
45、ve references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 61156-1:2007, Multicore and sym
46、metrical pair/quad cables for digital communications Part 1: Generic specification IEC 61156-6-1, Multicore and symmetrical pair/quad cables for digital communications Part 6-1: Symmetrical pair/quad cables with transmission characteristics up to 1 000 MHz Work area wiring Blank detail specification
47、 61156-6 IEC:2010+A1:2012(E) 7 IEC 62153-4-5, Metallic communication cables test methods Part 4-5: Electromagnetic compatibility (EMC) Coupling or screening attenuation Absorbing clamp method IEC 62153-4-9, Metallic communication cable test methods Part 4-9: Electromagnetic compatibility (EMC) Coupl
48、ing attenuation of screened balanced cables, triaxial method 3 Terms and definitions For the purposes of this document, the terms and definitions given in IEC 61156-1 apply. 4 Installation considerations See Clause 4 of IEC 61156-1. 4.1 Climatic conditions Under static conditions, the cables shall o
49、perate in the temperature range from 20 C to +60 C. The conductor and cable temperature dependence is specified for screened and unscreened cables and should be taken into account for the design of an actual cabling system. 5 Materials and cable construction 5.1 General remarks The choice of materials and cable construction shall be suitable for the intended application and installation of the cable. Particular care shall be taken to meet any special
