IEC 61156-4:2009

FOREWORD
1 General
  1.1 Scope
  1.2 Normative references
  1.3 Installation considerations
2 Definitions, materials and cable construction
  2.1 Definitions
  2.2 Materials and cable construction
      2.2.1 General remarks
      2.2.2 Cable construction
      2.2.3 Conductor
      2.2.4 Insulation
      2.2.5 Colour code of insulation
      2.2.6 Cable element
      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
3 Characteristics and requirements
  3.1 General remarks
  3.2 Electrical characteristics
      3.2.1 Conductor resistance
      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
      3.2.7 Transfer impedance
  3.3 Transmission characteristics
      3.3.1 Velocity of propagation (phase velocity)
      3.3.2 Attenuation
      3.3.3 Unbalance attenuation
      3.3.4 Near-end crosstalk (NEXT)
      3.3.5 Far-end crosstalk (FEXT)
      3.3.6 Characteristic impedance
      3.3.7 Structural Return Loss (SRL)
  3.4 Mechanical and dimensional characteristics and
      requirements
      3.4.1 Dimensional requirements
      3.4.2 Elongation at break of the conductors
      3.4.3 Elongation at break of the insulation
      3.4.4 Elongation at break of the sheath
      3.4.5 Tensile strength of the sheath
      3.4.6 Crush test of the cable
      3.4.7 Impact test of the cable
      3.4.8 Repeated bending of the cable
      3.4.9 Tensile performance of the cable
  3.5 Environmental characteristics
      3.5.1 Shrinkage of insulation
      3.5.2 Wrapping test of insulation after thermal ageing
      3.5.3 Bending test of insulation at low temperature
      3.5.4 Elongation at break of the sheath after ageing
      3.5.5 Tensile strength of the sheath after ageing
      3.5.6 Sheath pressure test at high temperature
      3.5.7 Cold bend test of the cable
      3.5.8 Heat shock test
      3.5.9 Flame propagation characteristics of a single
             cable
      3.5.10 Flame propagation characteristics of bunched
             cables
      3.5.11 Acid gas evolution
      3.5.12 Smoke generation
      3.5.13 Toxic gas emission
      3.5.14 Combined flame and smoke test for cables in
             environmental air handling space
4 Introduction to the blank detail specification

IEC 61156-4:2009(E) is a sectional specification and relates to IEC 61156-1:2002. The cables are specifically intended for riser wiring up to category 5 (class D) as defined and specified in ISO/IEC 11801:1995. It defines individually screened or unscreened pairs/quads cables, with or without overall common screen. When installed vertically extra length requirements may be applicable and are defined in the relevant specifications. This edition constitutes a technical revision. The main changes can be found in subclauses 3.3.1.2, 3.3.2, 3.3.4, 3.3.5, 3.3.5.1, 3.3.5.2, 3.3.6 and 3.4. This publication is to be read in conjunction with IEC 61156-1:2002.