SN EN 50168 : 1994

1 Guide to use
    1.1 Scope
    1.2 Introduction
    1.3 Installation considerations
    1.4 Object
2 Definitions and requirements
    2.1 General
    2.2 Reference publications
    2.3 Definitions
    2.4 Materials and cable construction
         2.4.1 General
         2.4.2 Cable construction
         2.4.3 Conductor
         2.4.4 Insulation
         2.4.5 Cable element
         2.4.6 Screening of the cable element
         2.4.7 Colour code of insulation
         2.4.8 Cable make up
         2.4.9 Screening of the cable core
         2.4.10 Sheath
         2.4.11 Colour of sheath
         2.4.12 Identification
         2.4.13 Finished cable
         2.4.14 Cable overall diameter
3 Characteristics and requirements
    3.1 General
    3.2 Electrical tests
         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
         3.3.2 Attenuation
         3.3.3 Unbalance attenuation
         3.3.4 Near end crosstalk
         3.3.5 Far end crosstalk
         3.3.6 Characteristics impedance
         3.3.7 Structural Return Loss (SRL)
         3.3.8 Longitudinal to Differential Conversion
                Loss (LCL)
    3.4 Mechanical and dimension characteristics and
         requirements
         3.4.1 Dimensional requirements
         3.4.2 Elongation at break of conductors
         3.4.3 Elongation and tensile strength at break
                of the insulation
         3.4.4 Elongation and tensile strength at break
                of sheath
         3.4.5 Crushing of the cable
         3.4.6 Impact test on the cable
         3.4.7 Repeated bending of the cable
         3.4.8 Tensile performance of the cable
    3.5 Environmental characteristics
         3.5.1 Shrinkage of insulation
         3.5.2 Wrapping of insulation after thermal
                ageing
         3.5.3 Bending of insulation at low temperature
         3.5.4 Elongation and tensile strength at break
                of the sheath after ageing
         3.5.5 Sheath pressure test at high temperature
         3.5.6 Cold bend of the cable
         3.5.7 Heat shock
         3.5.8 Flame propagation characteristics
                of single cable
         3.5.9 Flame propagation characteristics of
                bunched cables
         3.5.10 Acid gas evolution
         3.5.11 Smoke generation
         3.5.12 Toxic gas emission
4 Quality assessement procedures
Annex A (informative) Attentuation and NEXT