Telephone distribution wires
TRP, TRV under Belarus quality requirements 500017371.047-2008
TRP, TRV under quality requirements 16. К04.005-89
Telephone distribution wires are designed for permanent installation on and under plaster in dry and damp rooms (TRV) and permanent installation on external walls (TRP).
CONDUCTOR — soft copper single-wire.
INSULATION — polyethylene for TRP and PVC for TRV. Two parallel conductors are insulated and separated one from another by flat baffle from the same material.
|Trade mark||Number of conductors, pcs.||Nominal conductor diameter, mm||Nominal thickness of insulation, mm||Nominal dimension of separating baffle (thickness - width), mm||Max. outer dimensions (thickness - width), mm||Weight, kg/km|
*diameter 0,5 – for Belarus quality requirements 500017371.047-2008
DC resistance of conductor per 1 km at the temperature 20ºС is not more than:
- for conductor diameter 0,4 mm — 148 Ohm;
- for conductor diameter 0,5 mm — 94 Ohm
Operational temperature: from -60˚С to +65˚С (for TRP); from-40˚С to +65˚С (for TRV).
Wires resist to air humidity up to 98 % at the temperature +35˚С.
Permissible temperature during installation of wires with polyethylene insulation should not be below -30˚С, with PVC insulation – below -15˚С.
The delivery length should not be less than 400 meters, 40m and more wire pieces are possible to deliver but not more than 10% of total length of batch.
Average service life of wires is 12 years for exterior installation; 25 years for interior installation.