IEC IEC61156-15 Edition 1.02024-08 INTERNATIONAL STANDARD Multicore and symmetrical pairl quad cables for digital communications Part 15: Symmetrical pair/quad cables for horizontal floor wiring with transmission characteristics up to 1 ooo MHz and resistance to fire performance characteristics-Sectional specification IEC61156-15:2024-08(en) THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright @ 2024 IEC, Geneva, Switzerland or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC your local IEC member National Committee for further information. IEC Secretariat Tel.: +41 22 919 02 11 3, rue de Varembé [email protected] CH-1211Geneva20 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 latestedition,a corrigendum oranamendmentmighthavebeenpublished IECpublicationssearch-webstore.iec.ch/advsearchform IEC Products & Services Portal - products.iec.ch Discover our powerful search engine and read freely all the varietyof criteria (reference number, text,technical committee, ..). It also gives information on projects, replaced Witha subscriptionyouwill alwayshaveaccess touptodate and withdrawn publications content tailored to your needs. IECJustPublished-webstore.iec.ch/justpublished Electropedia -www.electropedia.org Stay up to date on all new IEC publications. Just Published The world's leading online dictionary on electrotechnology, details all newpublications released.Availableonlineandonce containing more than 22 500 terminological entries in English a month by email. and French, with equivalent terms in 25 additional languages. Also known as the International Electrotechnical Vocabulary IEC Customer Service Centre - webstore.iec.ch/csc (IEV) online If you wish to give us your feedback on this publication or need further assistance, please contact the Customer Service Centre: [email protected]. IEC IEC61156-15 Edition 1.02024-08 INTERNATIONAL STANDARD Multicore and symmetrical pairl quad cables for digital communications - Part 15:Symmetricalpairlquad cablesforhorizontal floor wiringwith transmission characteristics up to 1 0o0 MHz and resistance to fire performance characteristics-Sectional specification INTERNATIONAL ELECTROTECHNICAL COMMISSION ICS33.120.20 ISBN 978-2-8322-9555-7 Warning! Make sure that you obtained this publication from an authorized distributor. Registered tradem rk of the International Electrotechnical Commission - 2 - IEC 61156-15:2024@IEC 2024 CONTENTS FOREWORD INTRODUCTION.. .6 1 Scope... 2 Normative references 3 Terms and definitions . 4 Installation considerations 5 Materials and cable construction . .9 6 Characteristics and requirements 6.1 General remarks ..... 9 6.2 Electrical characteristics and tests .... 9 6.2.1 Conductor resistance.. 9 6.2.2 Resistance unbalance... 6.2.3 Dielectric strength.... 9 6.2.4 Insulation resistance .... .9 6.2.5 Mutual capacitance.... 9 6.2.6 Capacitance unbalance .. 6.2.7 Transfer impedance. 6.2.8 Coupling attenuation.. 6.2.9 Current-carrying capacity.. 6.3 Transmission characteristics... 10 6.3.1 Velocity of propagation (phase velocity)... 6.3.2 Phase delay and differential delay (delay skew).. 10 6.3.3 Attenuation (a).... 10 6.3.4 Unbalance attenuation (TCL) 6.3.5 Near-end crosstalk (NEXT)... 6.3.6 Far-end crosstalk (ACR-F).. 10 6.3.7 Alien (exogenous) near-end crosstalk (ANEXT), 10 6.3.8 Alien (exogenous) far-end crosstalk (AACR-F) 10 6.3.9 Alien (exogenous) crosstalk of bundled cables 10 6.3.10 Impedance..... 10 6.3.11 Return loss (RL).. 6.4 Mechanical and dimensional characteristics and re