IEC_61156-6-2020.pdf

IEC 61156-6 Edition 4.0 2020-04 INTERNATIONAL STANDARD Multicore and symmetrical pair/quad cables for digital communications Part 6:Symmetrical pair/quad cables with transmission characteristics up to 1 000 MHz Work area wiring Sectional specification IEC 61156-6:2020-04(en)THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2020 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 Tel.:+41 22 919 02 11 3,rue de Varemb infoiec.ch CH-1211 Geneva 20 www.iec.ch Switzerland 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 corrigendum or an amendment might have been published.IEC publications search-webstore.iec.ch/advsearchform The advanced search enables to find IEC publications by a variety of criteria(reference number,text,technical committee,).It also gives information on projects,replaced and withdrawn publications.IEC Just Published-webstore.iec.ch/justpublished Stay up to date on all new IEC publications.Just Published details all new publications released.Available online and once a month by email.IEC Customer Service Centre-webstore.iec.ch/csc If you wish to give us your feedback on this publication or need further assistance,please contact the Customer Service Centre:salesiec.ch.Electropedia-www.electropedia.org The worlds leading online dictionary on electrotechnology,containing more than 22 000 terminological entries in English and French,with equivalent terms in 16 additional languages.Also known as the International Electrotechnical Vocabulary(IEV)online.IEC Glossary-std.iec.ch/glossary 67 000 electrotechnical terminology entries in English and French extracted from the Terms and Definitions clause of IEC publications issued since 2002.Some entries have been collected from earlier publications of IEC TC 37,77,86 and CISPR.IEC 61156-6 Edition 4.0 2020-04 INTERNATIONAL STANDARD Multicore and symmetrical pair/quad cables for digital communications Part 6:Symmetrical pair/quad cables with transmission characteristics up to 1 000 MHz Work area wiring Sectional specification INTERNATIONAL ELECTROTECHNICAL COMMISSION ICS 33.120.20 ISBN 978-2-8322-7971-7 Registered trademark of the International Electrotechnical Commission Warning!Make sure that you obtained this publication from an authorized distributor.2 IEC 61156-6:2020 IEC 2020 CONTENTS FOREWORD.5 1 Scope.7 2 Normative references.7 3 Terms and definitions.8 4 Installation considerations.8 4.1 General remarks.8 4.2 Bending radius of installed cable.8 4.3 Climatic conditions.8 5 Materials and cable construction.8 5.1 General remarks.8 5.2 Cable construction.9 5.2.1 Conductor.9 5.2.2 Insulation.9 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 Identification.10 5.2.8 Finished cable.10 6 Characteristics and requirements.10 6.1 General remarks.10 6.2 Electrical characteristics and tests.10 6.2.1 Conductor resistance.10 6.2.2 Resistance unbalance.10 6.2.3 Dielectric strength.11 6.2.4 Insulation resistance.11 6.2.5 Mutual capacitance.11 6.2.6 Capacitance unbalance.11 6.2.7 Transfer impedance.11 6.2.8 Coupling attenuation.11 6.2.9 Current-carrying capacity.12 6.3 Transmission characteristics.12 6.3.1 Velocity of propagation(phase velocity).12 6.3.2 Phase delay and differential delay(delay skew).12 6.3.3 Attenuation.12 6.3.4 Unbalance attenuation(TCL).13 6.3.5 Near-end crosstalk(NEXT).14 6.3.6 Attenuation to crosstalk ratio far end(PS ACR-F).15 6.3.7 Alien(exogenous)near end crosstalk.15 6.3.8 Alien(exogenous)far-end crosstalk(AACR-F).16 6.3.9 Alien(exogenous)crosstalk of bundled cables.16 6.3.10 Impedance.16 6.3.11 Return loss(RL).16 6.4 Mechanical and dimensional characteristics and requirements.17 6.4.1 Dimensional requirements.17 6.4.2 Elongation at break of the conductors.17 IEC 61156-6:2020 IEC 2020 3 6.4.3 Tensile strength of the insulation.17 6.4.4 Elongation at break of the insulation.17 6.4.5 Adhesion of the insulation to the conductor.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.18 6.4.10 Bending under tension.18 6.4.11 Repeated bending of the cable.18 6.4.12 Tensile performance o