1、 IEC 61156-3 Edition 3.0 2008-11 INTERNATIONAL STANDARD Multicore and symmetrical pair/quad cables for digital communications Part 3: Work area cable Sectional specification IEC 61156-3:2008(E) THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2008 IEC, Geneva, Switzerland All rights reserved. Unles
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9、icore and symmetrical pair/quad cables for digital communications Part 3: Work area cable Sectional specification INTERNATIONAL ELECTROTECHNICAL COMMISSION N ICS 33.120.20 PRICE CODE ISBN 2-8318-1013-5 Registered trademark of the International Electrotechnical Commission 2 61156-3 IEC:2008(E) CONTEN
10、TS FOREWORD.4 1 General 6 1.1 Scope6 1.2 Normative references 6 1.3 Installation considerations6 2 Definitions, materials and cable construction.6 2.1 Definitions .6 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 Colo
11、ur code 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 requirements8 3.1 General remarks8 3.2 Electri
12、cal characteristics 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 characteristics9 3.3.1 Velocity of propagation (phase velocity) .9
13、 3.3.2 Attenuation 10 3.3.3 Unbalance attenuation .10 3.3.4 Near-end crosstalk (NEXT) 10 3.3.5 Characteristic impedance.11 3.3.6 Structural Return Loss (SRL) .11 3.4 Mechanical and dimensional characteristics and requirements .12 3.4.1 Dimensional requirements12 3.4.2 Elongation at break of the cond
14、uctors 12 3.4.3 Elongation at break of the insulation.12 3.4.4 Elongation at break of the sheath.12 3.4.5 Tensile strength of the sheath12 3.4.6 Crush test of the cable.12 3.4.7 Impact test of the cable12 3.4.8 Repeated bending of the cable.12 61156-3 IEC:2008(E) 3 3.4.9 Tensile performance of the c
15、able .13 3.5 Environmental characteristics 13 3.5.1 Shrinkage of insulation.13 3.5.2 Wrapping test of insulation after thermal ageing.13 3.5.3 Bending test of insulation at low temperature .13 3.5.4 Elongation at break of the sheath after ageing13 3.5.5 Tensile strength of the sheath after ageing.13
16、 3.5.6 Sheath pressure test at high temperature.13 3.5.7 Cold bend test of the cable 13 3.5.8 Heat shock test13 3.5.9 Flame propagation characteristics of a single cable13 3.5.10 Flame propagation characteristics of bunched cables.13 3.5.11 Acid gas evolution13 3.5.12 Smoke generation14 3.5.13 Toxic
17、 gas emission 14 3.5.14 Combined flame and smoke test for cables in environmental air handling space 14 4 Introduction to the blank detail specification 14 Table 1 Constants 10 Table 2 NEXT, PSNEXT constants .11 Table 3 Input impedance values .11 Table 4 Function fitted impedance11 Table 5 Structura
18、l return loss (dB min) .12 4 61156-3 IEC:2008(E) INTERNATIONAL ELECTROTECHNICAL COMMISSION _ MULTICORE AND SYMMETRICAL PAIR/QUAD CABLES FOR DIGITAL COMMUNICATIONS Part 3: Work area cable Sectional specification FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organizati
19、on 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 fields. To this end and in addition to other activities, IEC p
20、ublishes International Standards, Technical Specifications, Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with m
21、ay 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 Standardization (ISO) in accordance with conditions determined by agre
22、ement 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 representation from all interested IEC National Committees. 3) IEC
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25、responding 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 IEC Publication. 6) All users should ensure that they have the
26、 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 injury, property damage or other damage of any nature whatsoever,
27、 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 cited in this publication. Use of the referenced publications
28、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 identifying any or all such patent rights. International Standard IE
29、C 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 components and accessories. This third edition cancels and replaces the second edition published in 2003. This edition co
30、nstitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) new requirements for new cables Cat3, and Cat5 applications; b) a better numbering in order to take into account the generic specification. 61156-3 IEC:2008(E) 5
31、 The text of this standard is based on the first edition and on the following documents: FDIS Report on voting 46C/864/FDIS 46C/869/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 drafte
32、d in accordance with the ISO/IEC Directives, Part 2. This standard shall be read in conjunction with IEC 61156-1:2002. 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. Th
33、e 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 related to the specific publication. At this date, the publication will be reconfirmed; withdrawn; replaced by
34、 a revised edition, or amended. A bilingual version of this publication may be issued at a later date. 6 61156-3 IEC:2008(E) MULTICORE AND SYMMETRICAL PAIR/QUAD CABLES FOR DIGITAL COMMUNICATIONS Part 3: Work area cable Sectional specification 1 General 1.1 Scope This sectional specification relates
35、to IEC 61156-1:2002. The cables are specifically intended for work area wiring as defined in ISO/IEC 11801. This specification defines individually screened, common overall core screen and unscreened pairs or quads in cables for work area wiring. These cables are suitable for the various communicati
36、on systems for which the reference 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 examp
37、le, the public mains electricity supply. The recommended temperature range during installation is 0 o C to +50 o C. The actual temperature range during installation shall be indicated in the relevant detail specification. The normal operating temperature range shall be 40 o C to +60 o C. 1.2 Normati
38、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 61156-1:2002 1 , Multicore and
39、symmetrical pair/quad cables for digital communications Part 1: Generic specification IEC 60304, Standard colours for insulation for low-frequecny cables and wires IEC 60344, Calculation of d.c. resistance of plain and coated copper conductors of low- frequency cables and wires - Application guide I
40、SO/IEC 11801, Information technology Generic cabling for customer premises 1.3 Installation considerations See 1.3 of IEC 61156-1:2002 and ISO/IEC 11801. 2 Definitions, materials and cable construction 2.1 Definitions See 2.1 of IEC 61156-1:2002. _ 1A more recent version of this standard exists (200
41、7), 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. 61156-3 IEC:2008(E) 7 2.2 Materials and cable construction 2.2.1 General remarks The choice of materials and cable construction shall be suitable for the intended
42、 application and installation of the cable. Particular care shall be taken to meet any special requirements for fire performance (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
43、 dimensions given in the relevant detail cable specification. 2.2.3 Conductor The conductor shall consist of annealed copper. The conductor may be solid or stranded. The solid conductor nominal diameter shall be between 0,3 mm and 0,6 mm. Preferably, the stranded conductor should consist of seven st
44、rands. The conductor shall be plain or tinned copper. Joints in the complete element shall not be permitted. 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 thermoplas
45、tic material. The insulation may be solid or cellular with or without a solid dielectric skin. The insulation 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 cond
46、uctor connection. 2.2.5 Colour code of insulation The colour code is not specified but shall be indicated in the relevant detail specification. The colours shall be readily identifiable and shall correspond reasonably with the standard colours shown in IEC 60304. NOTE It is acceptable to mark or str
47、ipe the “a“ wire with the colour of the “b“ wire to facilitate pair identification. 2.2.6 Cable element The cable element 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 cable element may be provided. Th
48、e screen shall be in accordance with 2.2.7 of IEC 61156-1:2002. 8 61156-3 IEC:2008(E) 2.2.8 Cable make-up The cable elements shall be assembled to form the cable core. The core of the cable may be wrapped with a protective layer of non-hygroscopic and non- wicking material. 2.2.9 Screening of the ca
49、ble core When required by the relevant detail specification, a screen for the cable core may be provided. The screen shall be in accordance with 2.2.9 of IEC 61156-1:2002. 2.2.10 Sheath The sheath material shall consist of a suitable thermoplastic material. Examples of suitable materials are: polyolefin; PVC; fluoropolymer; low smoke zero halogen thermoplastic material. The sheath shall be continuous, having a thickness as uniform as possible. A non-metall
