NF EN 50169 : 1995

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 Capitance unbalance
3.2.7 Transfer impedance
3.3 Transmission characteristics
3.3.1 Velocity of propagation
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 of 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
3.5.9 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 assessment procedures
Annex A (informative) Attenuation and NEXT.

Covers individually screened or unscreened pair(s) or quad(s) in cables for vertical shafts or vertically between floors (riser backbone cables) or in horizontal between buildings (campus backbone cables). Covers cables that are meant to operate with voltages and currents normally adopted for communication systems.