IEC_61156-2-2010.pdf

IEC 61156-2Edition 3.0 2010-04INTERNATIONAL STANDARD Multicore and symmetrical pair/quad cables for digital communications Part 2:Symmetrical pair/quad cables with transmission characteristics up to 100 MHz Horizontal floor wiring Sectional specification IEC 61156-2:2010(E)LICENSED TO MECON LIMITED-RANCHI/BANGALORE,FOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2010 IEC,Geneva,Switzerland All rights reserved.Unless otherwise specified,no part of this publication may be reproduced or utilized in any form or by any means,electronic or mechanical,including photocopying and microfilm,without permission in writing from either IEC or IECs member National Committee in the country of the requester.If you have any questions about IEC copyright or have an enquiry about obtaining additional rights to this publication,please contact the address below or your local IEC member National Committee for further information.IEC Central Office 3,rue de Varemb CH-1211 Geneva 20 Switzerland Email:inmailiec.ch Web:www.iec.ch About the IEC The International Electrotechnical Commission(IEC)is the leading global organization that prepares and publishes International Standards for all electrical,electronic and related technologies.About IEC publications The technical content of IEC publications is kept under constant review by the IEC.Please make sure that you have the latest edition,a corrigenda or an amendment might have been published.?Catalogue of IEC publications:www.iec.ch/searchpub The IEC on-line Catalogue enables you to search by a variety of criteria(reference number,text,technical committee,).It also gives information on projects,withdrawn and replaced publications.?IEC Just Published:www.iec.ch/online_news/justpub Stay up to date on all new IEC publications.Just Published details twice a month all new publications released.Available on-line and also by email.?Electropedia:www.electropedia.org The worlds leading online dictionary of electronic and electrical terms containing more than 20 000 terms and definitions in English and French,with equivalent terms in additional languages.Also known as the International Electrotechnical Vocabulary online.?Customer Service Centre:www.iec.ch/webstore/custserv If you wish to give us your feedback on this publication or need further assistance,please visit the Customer Service Centre FAQ or contact us:Email:csciec.ch Tel.:+41 22 919 02 11 Fax:+41 22 919 03 00 LICENSED TO MECON LIMITED-RANCHI/BANGALORE,FOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.IEC 61156-2Edition 3.0 2010-04INTERNATIONAL STANDARD Multicore and symmetrical pair/quad cables for digital communications Part 2:Symmetrical pair/quad cables with transmission characteristics up to 100 MHz Horizontal floor wiring Sectional specification INTERNATIONAL ELECTROTECHNICAL COMMISSION PICS 33.120.20 PRICE CODEISBN 978-2-88910-419-2 Registered trademark of the International Electrotechnical Commission LICENSED TO MECON LIMITED-RANCHI/BANGALORE,FOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.2 61156-2 IEC:2010(E)CONTENTS FOREWORD.4 1 General.6 1.1 Scope and object.6 1.2 Normative references.6 1.3 Installation considerations.6 2 Definitions and requirements.7 2.1 Definitions.7 2.2 Materials and cable construction.7 2.2.1 General remarks.7 2.2.2 Cable construction.7 2.2.3 Conductor.7 2.2.4 Insulation.7 2.2.5 Colour code of insulation.7 2.2.6 Cable element.7 2.2.7 Screening of the cable element.8 2.2.8 Cable make-up.8 2.2.9 Screening of the cable core.8 2.2.10 Sheath.8 2.2.11 Colour of sheath.8 2.2.12 Identification.8 2.2.13 Finished cable.8 3 Characteristics and requirements.9 3.1 General remarks.9 3.2 Electrical characteristics.9 3.2.1 Conductor resistance.9 3.2.2 Resistance unbalance.9 3.2.3 Dielectric strength.9 3.2.4 Insulation resistance.9 3.2.5 Mutual capacitance.9 3.2.6 Capacitance unbalance.9 3.2.7 Transfer impedance.10 3.3 Transmission characteristics.10 3.3.1 Velocity of propagation(phase velocity).10 3.3.2 Attenuation.11 3.3.3 Unbalance attenuation.11 3.3.4 Near-end crosstalk(NEXT).11 3.3.5 Far-end crosstalk.11 3.3.6 Characteristic impedance.12 3.3.7 Structural return loss(SRL).12 3.4 Mechanical and dimensional characteristics and requirements.13 3.4.1 Dimensional requirements.13 3.4.2 Elongation 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 sheath.13 3.4.6 Crush test of the cable.13 3.4.7 Impact test of the cable.13 LICENSED TO MECON LIMITED-RANCHI/BANGALORE,FOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.61156-2 IEC:2010(E)3 3.4.8 Bending under tension.13 3.4.9 Tensile performance of the cable.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.14 3.5.4