1、 IEC 61156-5 Edition 2.1 2012-12 INTERNATIONAL STANDARD Multicore and symmetrical pair/quad cables for digital communications Part 5:Symmetrical pair/quad cables with transmission characteristics up to 1 000 MHz Horizontal floor wiring Sectional specification IEC 61156-5:2009+A1:2012(E)colourinsideC
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10、No further reproduction or distribution is permitted.Uncontrolled when printed.IEC 61156-5 Edition 2.1 2012-12 INTERNATIONAL STANDARD Multicore and symmetrical pair/quad cables for digital communications Part 5:Symmetrical pair/quad cables with transmission characteristics up to 1 000 MHz Horizontal
11、 floor wiring Sectional specification INTERNATIONAL ELECTROTECHNICAL COMMISSION ICS 33.120.20 ISBN 978-2-8322-0561-7 Registered trademark of the International Electrotechnical Commission Warning!Make sure that you obtained this publication from an authorized distributor.colourinsideCopyrighted mater
12、ial licensed to BR Demo by Thomson Reuters(Scientific),Inc.,downloaded on Nov-27-2014 by James Madison.No further reproduction or distribution is permitted.Uncontrolled when printed.2 61156-5 IEC:2009+A1:2012(E)CONTENTS FOREWORD.5 1 Scope.7 2 Normative references.7 3 Terms and definitions.8 4 Instal
13、lation 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.8 5.2.1 Conductor.8 5.2.2 Insulation.8 5.2.3 Cable element.9 5.2.4 Cable make-up.9 5.2.5 Screening of the
14、cable core.9 5.2.6 Sheath.9 5.2.7 Identification.9 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.10 6.2.4 Insulation resistance.10
15、6.2.5 Mutual capacitance.10 6.2.6 Capacitance unbalance.10 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 A
16、ttenuation().12 6.3.4 Unbalance attenuation(TCL).13 6.3.5 Near-end crosstalk(NEXT).14 6.3.6 Far-end crosstalk(FEXT).14 6.3.7 Alien(exogenous)near-end crosstalk(ANEXT).15 6.3.8 Alien(exogenous)far-end crosstalk(AFEXT).15 6.3.9 Alien(exogenous)crosstalk of bundled cables.16 6.3.10 Impedance.16 6.3.11 Return loss(RL).17 6.4 Mechanical and dimensional characteristics and requirements.17 6.4.1 Dimensional requirements.17 6.4.2 Elongation at break of the conductors.18 Copyrighted material licensed
