Single-pairphoneandradioinstallationcablesare designed for operation under up to 380 V and 10 kHz frequency on telephone lines and wire broadcasting network distribution circuits.
Cable models and their definitions shall correspond to the details given in the table below:
| Model | Definition | Application area |
| ПРППМ | Single-paircable with copper conductors, PE insulated, in PE sheath | In soil, underground conduits, on structure walls, line poles notaffected bystrong ice and wind |
| ПРПВМ | Single-paircable with copper conductors, PE insulated, in PVC sheath | In soil, underground conduit systems,on structure walls |
CONDUCTOR: copper, soft, single.
INSULATION: polyethylene.
SHEATH: light-stabilized polyethylene(ПРППМ), PVC compound (ПРПВМ).
NUMBER OF CONDUCTORS: 2
CONDUCTORDIAMETER, mm: 0.8; 0.9;1.2.
ПРПВМ cables do not spread combustion when single laid.
Conductor direct-current resistance for a length of 1 km at a temperature of +20°С shall be not less than:
- for conductor with 0.8 mm rated diameter - 36.0 Ω;
- for conductor with 0.9 mm rated diameter - 28.4 Ω;
- for conductor with 1.2 mm rated diameter - 16.0Ω.
Operation temperature for ПРППМ model: from -60°С to +50°С;
for ПРПВМmodel: from -40°С to +60°С.
Cablesareresistant to high atmospheric humidity up to 98% at temperature up to +35°C
Cabling shall be performed at ambient temperature not lower than -10°С with bend radius not less than ten outer cable diameters.
Factory cable length - not less than 500 m.
Operational life of cables - not less than 10 years.
