1、 IEC 61156-8 Edition 1.1 2013-05 INTERNATIONAL STANDARD Multicore and symmetrical pair/quad cables for digital communications Part 8: Symmetrical pair/quad cables with transmission characteristics up to 1 200 MHz Work area wiring Sectional specification IEC61156-8:2009+A1:2013(E) colourinsideTHIS PU
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9、e Centre: csciec.ch. IEC 61156-8 Edition 1.1 2013-05 INTERNATIONAL STANDARD Multicore and symmetrical pair/quad cables for digital communications Part 8: Symmetrical pair/quad cables with transmission characteristics up to 1 200 MHz Work area wiring Sectional specification INTERNATIONAL ELECTROTECHN
10、ICAL COMMISSION ICS 33.120.20 ISBN 978-2-8322-0853-3 Registered trademark of the International Electrotechnical Commission Warning! Make sure that you obtained this publication from an authorized distributor. colourinside 2 61156-8 IEC:2009+A1:2013(E) CONTENTS FOREWORD . 4 1 Scope . 6 2 Normative re
11、ferences 6 3 Terms and definitions . 6 4 Installation considerations . 7 4.1 Installation conditions 7 4.2 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
12、 8 5.2.5 Screening of cable core . 8 5.2.6 Sheath . 8 5.2.7 Identification 8 5.2.8 Finished cable . 8 6 Characteristics and requirements 8 6.1 General remarks 8 6.2 Electrical characteristics 9 6.2.1 Conductor resistance . 9 6.2.2 Resistance unbalance 9 6.2.3 Dielectric strength 9 6.2.4 Insulation r
13、esistance 9 6.2.5 Mutual capacitance 9 6.2.6 Capacitance unbalance 9 6.2.7 Transfer impedance . 9 6.2.8 Coupling attenuation 10 6.2.9 Current-carrying capacity . 10 6.2.10 Shield resistance . 10 6.3 Transmission characteristics 10 6.3.1 Velocity of propagation (phase velocity) . 10 6.3.2 Phase delay
14、 and differential delay (delay skew) 10 6.3.3 Attenuation 11 6.3.4 Unbalance attenuation . 11 6.3.5 Near-end crosstalk (NEXT) . 12 6.3.6 Far-end crosstalk (FEXT) . 12 6.3.7 Alien (exogenous) near-end crosstalk 12 6.3.8 Alien (exogenous) far-end crosstalk . 12 6.3.9 Alien (exogenous) crosstalk of bun
15、dled cables . 12 6.3.10 Impedance . 12 6.3.11 Return loss (RL) . 12 6.4 Mechanical and dimensional characteristics and requirements . 13 6.4.1 Dimensional requirements 13 6.4.2 Elongation at break of the conductors 13 61156-8 IEC:2009+A1:2013(E) 3 6.4.3 Tensile strength of the insulation 13 6.4.4 El
16、ongation at break of the insulation . 13 6.4.5 Adhesion of the insulation to the conductor 13 6.4.6 Elongation at break of the sheath . 13 6.4.7 Tensile strength of the sheath 13 6.4.8 Crush test of the cable . 13 6.4.9 Impact test of the cable 13 6.4.10 Bending under tension . 13 6.4.11 Repeated be
17、nding of the cable . 14 6.4.12 Tensile performance of the cable . 14 6.4.13 Shock test of the cable. 14 6.4.14 Bump test of the cable . 14 6.4.15 Vibration test of a cable . 14 6.5 Environmental characteristics 14 6.5.1 Shrinkage of insulation . 14 6.5.2 Wrapping test of insulation after thermal age
18、ing . 14 6.5.3 Bending test of insulation at low temperature . 14 6.5.4 Elongation at break of the sheath after ageing 14 6.5.5 Tensile strength of the sheath after ageing . 14 6.5.6 Sheath pressure test at high temperature . 14 6.5.7 Cold bend test of the cable 14 6.5.8 Heat shock test 15 6.5.9 Dam
19、p heat steady state . 15 6.5.10 Solar radiation . 15 6.5.11 Solvents and contaminating fluids 15 6.5.12 Salt mist and sulphur dioxide . 15 6.5.13 Water immersion . 15 6.5.14 Hygroscopicity . 15 6.5.15 Wicking . 15 6.5.16 Flame propagation characteristics of a single cable 15 6.5.17 Flame propagation
20、 characteristics of bunched cables . 15 6.5.18 Halogen gas evolution 15 6.5.19 Smoke generation 15 6.5.20 Toxic gas emission 15 6.5.21 Integrated fire test . 15 7 Introduction to the blank detail specification 16 Bibliography 17 Table 1 Transfer impedance . 10 Table 2 Coupling attenuation 10 Table 3
21、 Attenuation, constant values 11 Table 4 Return loss (RL) . 12 4 61156-8 IEC:2009+A1:2013(E) INTERNATIONAL ELECTROTECHNICAL COMMISSION _ MULTICORE AND SYMMETRICAL PAIR/QUAD CABLES FOR DIGITAL COMMUNICATIONS Part 8: Symmetrical pair/quad cables with transmission characteristics up to 1 200 MHz Work a
22、rea 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 international co-operation on all question
23、s concerning standardization in the electrical and electronic fields. To this end and in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”
24、). Their preparation is entrusted to technical committees; any 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 collabor
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31、lications. 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 of this IEC Publication may be the subject o
32、f patent rights. IEC shall not be held responsible for identifying any or all such patent rights. This consolidated version of IEC 61156-8 consists of the first edition (2009) documents 46C/887/FDIS and 46C/894/RVD, its corrigendum (July 2009) and its amendment 1 (2013) documents 46C/957/CDV and 46C
33、/966/RVC. It bears the edition number 1.1. 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 deletions are displ
34、ayed in red, with deletions being struck through. 61156-8 IEC:2009+A1:2013(E) 5 International Standard IEC 61156-8 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 a
35、ccessories. 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: Multicore and symmetrical pair/quad cables for digital communications, can be found on the IEC website. The committee has decided tha
36、t the contents of the base publication and its amendment 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 a re
37、vised edition, or 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
38、therefore print this publication using a colour printer. 6 61156-8 IEC:2009+A1:2013(E) MULTICORE AND SYMMETRICAL PAIR/QUAD CABLES FOR DIGITAL COMMUNICATIONS Part 8: Symmetrical pair/quad cables with transmission characteristics up to 1 200 MHz Work area wiring Sectional specification 1 Scope This se
39、ctional specification relates to IEC 61156-1 and IEC 61156-7. The cables described herein are specified up to 1 200 MHz and are specifically designed to build patch, equipment, and work area cables as defined in ISO/IEC 11801 and ISO/IEC 15018. It covers a cable having four individually screened (ST
40、P) pairs. The cable may be provided with a common screen over the cable core. The transmission characteristics are specified for a frequency range 4 MHz to 1 200 MHz and at 20 C. These cables can be used for various communication channels which use as many as four pairs simultaneously. In this sense
41、 this sectional specification provides the cable characteristics required by system developers to evaluate new systems. The cables covered by this sectional specification are intended to operate with voltages and currents normally encountered in communication systems. These cables are not intended
42、to be used in conjunction with low impedance sources, for example the electric power supplies of public utility mains. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated r
43、eferences, the latest edition of the referenced document (including any amendments) applies. IEC 60304, Standard colours for insulation for low-frequency cables and wires IEC 61156-1:2007, Multicore and symmetrical pair/quad cables for digital communications Part 1: Generic specification IEC 61156-7
44、 Multicore and symmetrical pair/quad cables for digital communications Part 7: Symmetrical pair cables with transmission characteristics up to 1 200 MHz Sectional specification for digital and analog communication cables 3 Terms and definitions For the purposes of this document, the terms and defin
45、itions defined in IEC 61156-1 apply. 61156-8 IEC:2009+A1:2013(E) 7 4 Installation considerations 4.1 Installation conditions Installation considerations are defined in Clause 4 of IEC 61156-1. 4.2 Climatic conditions Under static conditions, the cables shall operate in the temperature range from 20
46、C to +60 C. The temperature dependence of the cables is specified, 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 ins
47、tallation of the cable. Particular care shall be taken to meet any special requirements for the fire performance (such as burning 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
48、in the relevant detail specification. 5.2.1 Conductor The conductor shall be solid or stranded annealed copper conductor, in accordance with IEC 61156-1 and shall have a nominal diameter between 0,4 mm to 0,65 mm. The stranded conductor should have preferably seven strands. Higher conductor diameter
49、s may be used if compatible with the connecting hardware. 5.2.2 Insulation The conductor shall be insulated with a suitable thermoplastic material. Examples of suitable materials are polyolefin; fluoropolymer; low-smoke zero-halogen thermoplastic 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 insulatio
