Telephone Cables

Sheath
Black low density polyethylene as per BS 6234/IEC 60708, being able to withstand exposure to sunlight, temperature variations, ground chemicals and other environmental contaminants

Twisted Pairs
Insulated conductors are twisted into pairs with varying lay length to minimize crosstalk.

Insulation
Solid polyethylene as per BS EN 50290-2-23/BS 6234/IEC 60708

Conductors
Solid annealed bare copper, 0.32/0.4/0.5/0.63/0.9mm as per BS 6360/IEC 60228 Class 1

Construction

Telephone Cables/Solid PE Insulated & PE Sheathed Air Core Cables to CW 1171

Cables with 100 pairs or less are composed of 25-pair units or 12/13-pair units; cables with over 100 pairs are composed of 25,