IEC IEC61156-2 Edition3.02010-04 INTERNATIONAL STANDARD Multicore and symmetrical pair/quad cables for digital communications- Part 2: Symmetrical pair/quad cables with transmission characteristics up to 1oo MHz -Horizontal floor wiring - Sectional specification IEC 61156-2:2010(E) ical Commission hout licensefrom IHS S/201614:17:05MS IEC IEC 61156-2 Edition 3.0 2010-04 INTERNATIONAL STANDARD Multicore and symmetrical pair/quad cables for digital communications- Part 2: Symmetrical pair/quad cables with transmission characteristics up to 1oo MHz - Horizontal floor wiring - Sectional specification INTERNATIONAL ELECTROTECHNICAL COMMISSION PRICECODE P ICS 33.120.20 ISBN 978-2-88910-419-2 ense from IHS Not for Resale, 02/16/2016 14:17:05 MST 61156-2@IEC:2010(E) - 2 - CONTENTS FOREWORD General. 6 1.1 Scope and object.. .6 1.2 Normative references 6 1.3 Installation considerations. Definitions and requirements..... 2.1 Definitions ... 2.2 Materials and cable construction.. 2.2.1 General remarks.. 2.2.2 Cable construction. 2.2.3 2.2.4 Insulation.. 2.2.5 Colour code of insulation.. 2.2.6 Cableelement 2.2.7 Screening of the cable element. 2.2.8 Cable make-up .. 2.2.9 Screening of the cable core. 2.2.10 Sheath... 2.2.11 Colour of sheath 2.2.12 Identification....... 2.2.13 Finished cable. Characteristics and requirements. 3 3.1 General remarks. 9 3.2 Electrical characteristics. 3.2.1 Conductorresistance 3.2.2 Resistance unbalance 3.2.3 Dielectric strength 3.2.4 Insulation resistance 3.2.5 Mutual capacitance 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 .... 3.3.3 Unbalance attenuation ... .11 3.3.4 Near-end crosstalk (NEXT).. 3.3.5 Far-end crosstalk... 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..... 3.4.2 Elongationatbreakoftheconductors 3.4.3 Elongationatbreak of the insulation. 13 3.4.4 Elongation at break of the sheath .. 13 3.4.5 Tensile strength of the sheath 3.4.6 Crush test of the cable.. 3.4.7 Impact test of the cable... 13 Copyright Intermational Electrotechnical Commission put license from IHS Not for Resale, 02/16/2016 14:17:05 MST