1、 IEC 61156-5Edition 2.0 2009-02INTERNATIONAL STANDARD Multicore and symmetrical pair/quad cables for digital communications Part 5: Symmetrical pair/quad cables with transmission characteristics up to 1 000 MHz-horizontal floor wiring Sectional specification IEC61156-5:2009(E) THIS PUBLICATION IS CO
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9、11 Fax: +41 22 919 03 00 IEC 61156-5Edition 2.0 2009-02INTERNATIONAL STANDARD Multicore and symmetrical pair/quad cables for digital communications Part 5: Symmetrical pair/quad cables with transmission characteristics up to 1 000 MHz-horizontal floor wiring Sectional specification INTERNATIONAL ELE
10、CTROTECHNICAL COMMISSION TICS 33.120.20 PRICE CODEISBN 2-8318-1032-2 Registered trademark of the International Electrotechnical Commission 2 61156-5 IEC:2009(E) CONTENTS FOREWORD.5 1 Scope.7 2 Normative references .7 3 Terms and definitions .8 4 Installation considerations 8 4.1 General remarks8 4.2
11、 Bending radius of installed cable.8 4.3 Climatic conditions 8 5 Materials and cable construction 8 5.1 General remarks8 5.2 Cable construction 8 5.2.1 Conductor8 5.2.2 Insulation.8 5.2.3 Cable element .9 5.2.4 Cable make-up 9 5.2.5 Screening of the cable core .9 5.2.6 Sheath.9 5.2.7 Identification9
12、 5.2.8 Finished cable .10 6 Characteristics and requirements .10 6.1 General remarks10 6.2 Electrical characteristics and tests 10 6.2.1 Conductor resistance.10 6.2.2 Resistance unbalance .10 6.2.3 Dielectric strength .10 6.2.4 Insulation resistance10 6.2.5 Mutual capacitance10 6.2.6 Capacitance unb
13、alance .11 6.2.7 Transfer impedance.11 6.2.8 Coupling attenuation11 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) 12 6.3.3 Attenuation ().12 6.3.4 Unbalance attenuation (
14、TCL) .13 6.3.5 Near-end crosstalk (NEXT).13 6.3.6 Far-end crosstalk (FEXT) .14 6.3.7 Alien (exogenous) near-end crosstalk (ANEXT) 14 6.3.8 Alien (exogenous) far-end crosstalk (AFEXT) .15 6.3.9 Alien (exogenous) crosstalk of bundled cables 15 6.3.10 Impedance.15 6.3.11 Return loss (RL) 16 6.4 Mechani
15、cal and dimensional characteristics and requirements 17 6.4.1 Dimensional requirements .17 6.4.2 Elongation at break of the conductors17 61156-5 IEC:2009(E) 3 6.4.3 Tensile strength of the insulation .17 6.4.4 Elongation at break of the insulation17 6.4.5 Adhesion of the insulation to the conductor
16、17 6.4.6 Elongation at break of the sheath 17 6.4.7 Tensile strength of the sheath .17 6.4.8 Crush test of the cable 17 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 performance of the cable.17 6.4.13 Shock-test requirement
17、s of the cable.17 6.4.14 Bump-test requirements of the cable .18 6.4.15 Vibration-test requirements of a cable .18 6.5 Environmental characteristics18 6.5.1 Shrinkage of insulation 18 6.5.2 Wrapping test of insulation after thermal ageing 18 6.5.3 Bending test of insulation at low temperature 18 6.5
18、4 Elongation at break of the sheath after ageing.18 6.5.5 Tensile strength of the sheath after ageing 18 6.5.6 Sheath pressure test at high temperature 18 6.5.7 Cold bend test of the cable18 6.5.8 Heat shock test18 6.5.9 Damp heat steady state.18 6.5.10 Solar radiation (UV test) 18 6.5.11 Solvents
19、and contaminating fluids19 6.5.12 Salt mist and sulphur dioxide.19 6.5.13 Water immersion .19 6.5.14 Hygroscopicity.19 6.5.15 Wicking .19 6.5.16 Flame propagation characteristics of a single cable.19 6.5.17 Flame propagation characteristics of bunched cables 19 6.5.18 Halogen gas evolution .19 6.5.1
20、9 Smoke generation .19 6.5.20 Toxic gas emission 19 6.5.21 Integrated fire test .19 7 Category 5e multipair cable 19 7.1 General .19 7.2 Transmission.20 8 Introduction to the blank detail specification .20 Annex A (informative) Acronyms for common cable constructions21 Bibliography23 Figure 1 Impeda
21、nce template.16 Figure A.1 Common cable construction examples 22 Table 1 Cable categories .7 Table 2 Transfer impedance 11 Table 3 Coupling attenuation .11 4 61156-5 IEC:2009(E) Table 4 Attenuation equation constants .12 Table 5 Near-end unbalance attenuation13 Table 6 Worst-pair PS NEXT(1) values 1
22、4 Table 7 Worst-pair PS EL FEXT(1) values .14 Table 8 PS ANEXT 15 Table 9 PS AACR-F.15 Table 10 Return loss16 Table A.1 Cable construction acronyms .21 61156-5 IEC:2009(E) 5 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ MULTICORE AND SYMMETRICAL PAIR/QUAD CABLES FOR DIGITAL COMMUNICATIONS Part 5: Symm
23、etrical pair/quad cables with transmission characteristics up to 1 000 MHz-horizontal floor wiring Sectional specification FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National
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32、 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 application of this publication. 9) Attention is drawn t
33、o 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 61156-5 has been prepared by subcommittee 46C: Wires and symmetric cables, of IEC techn
34、ical committee 46: Cables, wires, waveguides, R.F. connectors, R.F. and microwave passive components and accessories. This part of IEC 61156 is to be read in conjunction with IEC 61156-1. This second edition cancels and replaces the first edition published in 2002. This edition constitutes a technic
35、al revision. This edition includes the following significant technical changes with respect to the previous edition: a) new requirements for new Cat6Aand Cat7Acables; 6 61156-5 IEC:2009(E) b) revised requirements and tests for Cat5e, Cat6 and Cat7 cables. The text of this standard is based on the fi
36、rst edition and on the following documents: FDIS Report on voting 46C/878 /FDIS 46C/888/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,
37、 Part 2. A list of all 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 maintenance result date
38、 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 date. 61156-5 IEC:20
39、09(E) 7 MULTICORE AND SYMMETRICAL PAIR/QUAD CABLES FOR DIGITAL COMMUNICATIONS Part 5: Symmetrical pair/quad cables with transmission characteristics up to 1 000 MHz-horizontal floor wiring Sectional specification 1 Scope This part of IEC 61156 describes the cables intended primarily for horizontal f
40、loor wiring as defined in ISO/IEC 11801. It covers individually screened, common screened and unscreened pairs or quads (see Annex A). The transmission characteristics and the frequency range (see Table 1) of the cables are specified at 20 C. Table 1 Cable categories Cable designation Maximum refere
41、nced 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 provides the cable characteristics required by syst
42、em developers to evaluate new systems. The cables covered by this standard 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 suppl
43、ies of public utility mains, they are intended to be used to support the delivery of low voltage and power applications such as IEEE 802.3af (Power over Ethernet) and IEEE 802.3at (Power over Ethernet Plus). 2 Normative references The following referenced documents are indispensable for the applicat
44、ion 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, Multicore and symmetrical pair/quad cables for digital communications Part 1: Generic specification IEC 6
45、1156-5-1, Multicore and symmetrical pair/quad cables for digital communications Symmetrical pair/quad cables with transmission characteristics up to 1 000 MHz Horizontal floor wiring Blank detail specification 8 61156-5 IEC:2009(E) IEC 62153-4-5, Metallic communication cables test methods Part 4-5:
46、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) Coupling attenuation of screened balanced cables, triaxial method 3 Terms and definitions For the purpos
47、es of this document, the terms and definitions defined in IEC 61156-1 apply. 4 Installation considerations 4.1 General remarks Installation considerations are defined in Clause 4 of IEC 61156-1. 4.2 Bending radius of installed cable. The bending radius of the installed cable shall not be less than 4
48、 times the outside diameter of the cable. 4.3 Climatic conditions Under static conditions, the cables shall operate in the temperature range from 40 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 des
49、ign of an actual cabling system. Other temperature ranges may be specified in the relevant detail specification. 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 requirements for EMC and fire performance (such as burning properties, smoke generation, evolution of halogen
