1、 IEC 61156-6Edition 3.0 2010-01INTERNATIONAL 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(E) THIS PUBLICATION IS COPYRIGHT
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9、 +41 22 919 03 00 IEC 61156-6Edition 3.0 2010-01INTERNATIONAL 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 ELECTROTECHNICAL
10、COMMISSION RICS 33.120.20 PRICE CODEISBN 2-8318-1073-9 Registered trademark of the International Electrotechnical Commission 2 61156-6 IEC:2010(E) CONTENTS FOREWORD.4 1 Scope.6 2 Normative references .6 3 Terms and definitions .7 4 Installation considerations 7 4.1 Climatic conditions 7 5 Materials
11、and cable construction 7 5.1 General remarks7 5.2 Cable construction 7 5.2.1 Conductor7 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 .8 5.2.6 Sheath.8 5.2.7 Identification8 6 Characteristics and requirements .8 6.1 General remarks8 6.2 Electrical
12、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 resistance9 6.2.5 Mutual capacitance9 6.2.6 Capacitance unbalance .9 6.2.7 Transfer impedance.9 6.2.8 Coupling attenuation10 6.2.9 Current-carrying capacity.10 6.3 Tra
13、nsmission 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 Attenuation11 6.3.4 Unbalance attenuation.11 6.3.5 Near-end crosstalk (NEXT).12 6.3.6 Attenuation to crosstalk ratio far end (PS ACR-F) .12 6.3.7 Alien (exog
14、enous) near end crosstalk 13 6.3.8 Alien (exogenous) far-end crosstalk (AACR-F) .13 6.3.9 Alien (exogenous) crosstalk of bundled cables 14 6.3.10 Impedance.14 6.3.11 Return loss (RL) 15 6.4 Mechanical and dimensional characteristics and requirements 15 6.4.1 Dimensional requirements .15 6.4.2 Elonga
15、tion at break of the conductors15 6.4.3 Tensile strength of the insulation .16 6.4.4 Elongation at break of the insulation16 6.4.5 Adhesion of the insulation to the conductor .16 61156-6 IEC:2010(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 tes
16、t of the cable 16 6.4.9 Impact test of the cable .16 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
17、a cable .16 6.5 Environmental characteristics17 6.5.1 Shrinkage of the insulation 17 6.5.2 Wrapping test of the insulation after thermal 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 a
18、fter ageing 17 6.5.6 Sheath pressure test at high temperature 17 6.5.7 Cold bend test of the cable17 6.5.8 Heat shock test17 6.5.9 Damp heat steady state.17 6.5.10 Solar radiation .17 6.5.11 Solvents and contaminating fluids17 6.5.12 Salt mist and sulphur dioxide.17 6.5.13 Water immersion .18 6.5.14
19、 Hygroscopicity.18 6.5.15 Wicking .18 6.5.16 Flame propagation characteristics of a single cable.18 6.5.17 Flame propagation characteristics of bunched cables 18 6.5.18 Halogen gas evolution .18 6.5.19 Smoke generation .18 6.5.20 Toxic gas emission 18 6.5.21 Integrated fire test .18 7 Introduction t
20、o the blank detail specification .19 Bibliography20 Figure 1 Impedance template.15 Table 1 Cable categories .6 Table 2 Transfer impedance 10 Table 3 Coupling attenuation .10 Table 4 Attenuation, constant values .11 Table 5 Near-end unbalance attenuation12 Table 6 Worst pair PS NEXT values 12 Table 7
21、 Worst pair PS ACR-F 13 Table 8 PS ANEXT 13 Table 9 PS AACR-F (PS AELFEXT) .14 Table 10 Return loss15 4 61156-6 IEC:2010(E) INTERNATIONAL ELECTROTECHNICAL COMMISSION _ MULTICORE AND SYMMETRICAL PAIR/QUAD CABLES FOR DIGITAL COMMUNICATIONS Part 6: Symmetrical pair/quad cables with transmission charact
22、eristics up to 1 000 MHz Work area wiring 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 internation
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31、osts (including legal fees) and expenses arising out of the publication, use of, or reliance upon, 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 appl
32、ication of this publication. 9) Attention is drawn to the possibility that some of the elements 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. International Standard IEC 61156-6 has been prepared by subcom
33、mittee 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 third edition cancels and replaces the second edition published in 2007. This third edition constitutes a technical revision.
34、 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. 61156-6 IEC:2010(E) 5 The text of this standard is based on the following documents: FDIS Report
35、 on voting 46C/903/FDIS 46C/908/RVD Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above table. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. This standard shall be read in conjunction with
36、 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 contents of this publication will remain unchanged until the maint
37、enance result 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 amended. A bilingual version of this publication may be issued at a later da
38、te. 6 61156-6 IEC:2010(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 makes reference to IEC 61156-1. The cables de
39、scribed 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) of the cables are specified at 20 C. Table
40、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. In this sense, this sectional specification
41、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 be used in conjunction with low impedance s
42、ources, 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 Normative references The following referenced docu
43、ments 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 symmetrical pair/quad cables for digital commu
44、nications 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 61156-6 IEC:2010(E) 7 IEC 62153-4-9, Metal
45、lic communication cable test methods Part 4-9: Electromagnetic compatibility (EMC) Coupling 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 Clau
46、se 4 of IEC 61156-1. 4.1 Climatic conditions Under static conditions, the cables shall operate 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 cabl
47、ing 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 requirements for EMC and fire performance (such as burnin
48、g properties, smoke generation, evolution of halogen gas, etc.). 5.2 Cable construction The cable construction shall be in accordance with the details and dimensions given in the relevant detail specification. 5.2.1 Conductor The conductor shall be a solid or stranded annealed copper, in accordance
49、with 5.2.1 of IEC 61156-1 and should have a nominal diameter between 0,4 mm and 0,65 mm. A conductor diameter of up to 0,8 mm may be used. 5.2.2 Insulation The conductor shall be insulated with a suitable material. Examples of suitable materials are polyolefin; fluoropolymer; low-smoke zero-halogen thermoplastic material. 5.2.3 Cable element The cable element shall be a pair or quad and shall be twisted. 5.2.3.1 Screening of the cable element W
