1、 IEC 61156-4 Edition 3.0 2009-05 INTERNATIONAL STANDARD Multicore and symmetrical pair/quad cables for digital communications Part 4: Riser cables Sectional specification IEC 61156-4:2009(E) THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2009 IEC, Geneva, Switzerland All rights reserved. Unless o
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9、re and symmetrical pair/quad cables for digital communications Part 4: Riser cables Sectional specification INTERNATIONAL ELECTROTECHNICAL COMMISSION P ICS 33.120.20 PRICE CODE ISBN 2-8318-1038-9 Registered trademark of the International Electrotechnical Commission 2 61156-4 IEC:2009(E) CONTENTS FOR
10、EWORD.4 1 General 6 1.1 Scope6 1.2 Normative references 6 1.3 Installation considerations6 2 Definitions, materials and cable construction.7 2.1 Definitions .7 2.2 Materials and cable construction7 2.2.1 General remarks7 2.2.2 Cable construction.7 2.2.3 Conductor7 2.2.4 Insulation.7 2.2.5 Colour cod
11、e of insulation7 2.2.6 Cable element .7 2.2.7 Screening of the cable element 7 2.2.8 Cable make-up 8 2.2.9 Screening of the cable core8 2.2.10 Sheath.8 2.2.11 Colour of sheath 8 2.2.12 Identification8 2.2.13 Finished cable .8 3 Characteristics and requirements9 3.1 General remarks9 3.2 Electrical ch
12、aracteristics 9 3.2.1 Conductor resistance.9 3.2.2 Resistance unbalance9 3.2.3 Dielectric strength9 3.2.4 Insulation resistance9 3.2.5 Mutual capacitance9 3.2.6 Capacitance unbalance9 3.2.7 Transfer impedance.9 3.3 Transmission characteristics10 3.3.1 Velocity of propagation (phase velocity) .10 3.3
13、.2 Attenuation 10 3.3.3 Unbalance attenuation .11 3.3.4 Near-end crosstalk (NEXT) 11 3.3.5 Far-end crosstalk (FEXT).11 3.3.6 Characteristic impedance.12 3.3.7 Structural Return Loss (SRL) .13 3.4 Mechanical and dimensional characteristics and requirements .13 3.4.1 Dimensional requirements13 3.4.2 E
14、longation at break of the conductors 13 3.4.3 Elongation at break of the insulation.13 3.4.4 Elongation at break of the sheath.13 3.4.5 Tensile strength of the sheath13 61156-4 IEC:2009(E) 3 3.4.6 Crush test of the cable.13 3.4.7 Impact test of the cable13 3.4.8 Repeated bending of the cable.13 3.4.
15、9 Tensile performance of the cable .13 3.5 Environmental characteristics 14 3.5.1 Shrinkage of insulation.14 3.5.2 Wrapping test of insulation after thermal ageing.14 3.5.3 Bending test of insulation at low temperature .14 3.5.4 Elongation at break of the sheath after ageing14 3.5.5 Tensile strength
16、 of the sheath after ageing.14 3.5.6 Sheath pressure test at high temperature.14 3.5.7 Cold bend test of the cable 14 3.5.8 Heat shock test14 3.5.9 Flame propagation characteristics of a single cable14 3.5.10 Flame propagation characteristics of bunched cables.14 3.5.11 Acid gas evolution14 3.5.12 S
17、moke generation14 3.5.13 Toxic gas emission 15 3.5.14 Combined flame and smoke test for cables in environmental air handling space 15 4 Introduction to the blank detail specification 15 Table 1 constants.11 Table 2 NEXT, PSNEXT constants .11 Table 3 EL FEXT, IO FEXT values .12 Table 4 Input impedanc
18、e values .12 Table 5 Function fitted impedance12 Table 6 Structural return loss (dB min) .13 4 61156-4 IEC:2009(E) INTERNATIONAL ELECTROTECHNICAL COMMISSION _ MULTICORE AND SYMMETRICAL PAIR/QUAD CABLES FOR DIGITAL COMMUNICATIONS Part 4: Riser cables Sectional specification FOREWORD 1) The Internatio
19、nal 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
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21、y IEC National Committee interested in the subject dealt with may participate in this preparatory work. International, governmental and non- governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for Standar
22、dization (ISO) in accordance with conditions determined by agreement between the two organizations. 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international consensus of opinion on the relevant subjects since each technical committee has repr
23、esentation from all interested IEC National Committees. 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC Publications is accurate, IE
24、C cannot be held responsible for the way in which they are used or for any misinterpretation by any end user. 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications transparently to the maximum extent possible in their national and regional publi
25、cations. Any divergence between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter. 5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any equipment declared to be in conformity with an
26、 IEC Publication. 6) All users should ensure that they have the latest edition of this publication. 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and members of its technical committees and IEC National Committees for any personal in
27、jury, property damage or other damage of any nature whatsoever, whether direct or indirect, or for costs (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
28、 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 of this IEC Publication may be the subject of patent rights. IEC shall not be held responsible for ident
29、ifying any or all such patent rights. International Standard IEC 61156-4 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 components and accessories. This standard is to be read in
30、 conjunction with IEC 61156-1: 2002. This third edition cancels and replaces the second edition published in 2003. This edition constitutes a technical revision. This sectional specification relates to IEC 61156-1:2002. The cables are specifically intended for riser wiring up to category 5 (class D)
31、 as defined and specified in ISO/IEC 11801: 1995. The main changes can be found in subclauses 3.3.1.2, 3.3.2, 3.3.4, 3.3.5, 3.3.5.1, 3.3.5.2, 3.3.6 and 3.4. 61156-4 IEC:2009(E) 5 The text of this standard is based on the first edition and on the following documents: FDIS Report on voting 46C/884/FDI
32、S 46C/892/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 A list of all parts of the IEC 61156 series, under the general title M
33、ulticore 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 indicated on the IEC web site under “http:/webstore.iec.ch“ in the data relat
34、ed 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. 6 61156-4 IEC:2009(E) MULTICORE AND SYMMETRICAL PAIR/QUAD CABLES FOR DIGITAL COMMUNICATIONS
35、Part 4: Riser cables Sectional specification 1 General 1.1 Scope This part of IEC 61156 which is a sectional specification relates to IEC 61156-1:2002. The cables are specifically intended for riser wiring up to category 5 (class D) as defined and specified in ISO/IEC 11801:1995. This specification
36、defines individually screened or unscreened pairs/quads cables, with or without overall common screen. When installed vertically extra length requirements may be applicable and are defined in the relevant specifications. These cables are suitable for the various communication systems for which the r
37、eference is given in the relevant detail specification. The cables covered by this sectional specification are intended to operate with voltages and currents normally adopted for communication systems. These cables should not be connected to low impedance sources, for example, the public mains elect
38、ricity supply. The recommended temperature range during installation is 0 o C to +50 o C. The normal operating temperature range is 40 o C to +60 o C. The actual temperatures range shall be indicated in the relevant detail specification. 1.2 Normative references The following referenced documents ar
39、e 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 61156-1:2002 1 , Multicore and symmetrical pair/quad cables for digital communicat
40、ions Part 1: Generic specification IEC 60304, Standard colours for insulation for low-frequency cables and wires IEC 60344, Guide to calculation of resistance of plain and tinned copper conductors of lowfrequency cables and wires ISO/IEC 11801, Information technology Generic cabling for customer pre
41、mises 1.3 Installation considerations See IEC 61156-1:2002. _ 1A more recent version of this standard exists (2007), but as not all of the tests cited herein are addressed by the newer edition, it has been decided that the 2002 edition is to be used. 61156-4 IEC:2009(E) 7 2 Definitions, materials an
42、d cable construction 2.1 Definitions See 2.1 of IEC 61156-1:2002. 2.2 Materials and cable construction 2.2.1 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
43、 requirements for flame propagation (such as burning properties, smoke generation, evolution of halogen gas, etc.). 2.2.2 Cable construction The cable construction shall be in accordance with the details and dimensions given in the relevant detail cable specification. 2.2.3 Conductor The conductor s
44、hall consist of annealed bare or tinned copper. The conductor shall be a solid annealed copper conductor, in accordance with 2.2.3 of IEC 61156-1:2002 and shall have a nominal diameter of between 0,5 mm and 0,65 mm. Conductor diameter up to 0,8 mm may be used if compatible with the connecting hardwa
45、re. 2.2.4 Insulation The conductor shall be insulated with a suitable thermoplastic material. Examples of suitable materials are: polyolefin; PVC; fluoropolymer; low smoke zero halogen thermoplastic material. The insulation may be solid or cellular with or without a solid dielectric skin. The insula
46、tion shall be continuous and shall have a thickness such that the completed cable meets the specified requirements. The nominal thickness of insulation shall be compatible with the method of conductor connection. 2.2.5 Colour code of insulation The colour code is not specified but shall be indicated
47、 in the relevant detail specification. The colours shall be readily identifiable and shall correspond reasonably with the standard IEC 60304. NOTE It is acceptable to mark or stripe the “a” wire with the colour of the “b” wire to facilitate pair identification. 2.2.6 Cable element The cable element
48、shall be a pair or quad adequately twisted to aid pair/quad identification. 2.2.7 Screening of the cable element When required, a screen for the cabling element may be provided. The screen shall be in accordance with 2.2.7 of IEC 61156-1:2002. 8 61156-4 IEC:2009(E) 2.2.8 Cable make-up The cable elem
49、ents shall be assembled into a core or into units which are further assembled to form the cable core. Each unit shall be helically wrapped with a colour coded, non-hygroscopic and non-wicking binder or as specified in the relevant detail specification. The colour code shall be indicated in the relevant detail specification. When required in the relevant detail specification a screen for the unit may be provided. The screen shall be in accordance with 2.2.7 of I
