Single-pair wire, with copper conductors, in a polyethylene insulating-protective sheath, for telephone communication and radio communication
1. The conductors through which the current passes are made of copper wire with a diameter of 0.8, 0.9 or 1.2 mm.
2. Insulating protective sheath – superimposed on current-carrying conductors, laid in parallel in one plane.
Sheath thickness on cores with a diameter of 0.8 mm – not less than 0.9 mm, 0.9 mm – not less than 1 mm, on conductors with a diameter of 1.2 mm – not less than 1.2 mm.
Decipher the “PRPPM” wire as follows:
P – The wire
R – For radio transmission
P – Polyethylene insulation
P – Polyethylene sheath
M – Copper solid conductors
The wires are intended for stationary hidden and open subscriber wiring of the telephone distribution network inside premises and along the outer walls of buildings, at voltages up to 380 V and frequency up to 10 kHz on subscriber telephone lines and distribution networks of wire broadcasting. Laying in the ground, telephone sewers, collectors, along the outer walls of buildings, suspension on poles of overhead communication lines.
A single-pair wire PRPPM, due to its electromechanical properties, is not rational to use for installation inside a building. It is allowed to lay it in the open ground, telephone sewer mines, on the outer walls of the building.
Installation is also possible on air poles, provided there are no strong winds and the threat of icing. In this case, a mounting cable is provided in the construction of the wire. It is recommended to lay the cable at a temperature not lower than minus 10 ° C. Temperature range of cable operation from minus 60 ° C to 50 ° C.
electrical resistance of a current-carrying conductor no more than 36.0 Ohm;
electrical insulation resistance: not less than 6000 MOhm;
operating temperature range: from -60 ° С to 60 ° С;
temperature range of laying and installation: from -10 ° С to 50 ° С;
bending radius: not less than 10 smallest outer dimensions of the cable;
when laying, the pulling force should not be more than 392 N (40 kgf);