Cables are designed for mounting of control, signaling, communication circuits, inter-instrument connections operating at rated alternating voltages of 500 and 1000 V, frequencies not exceeding 200 kHz or, respectively, at constant voltages of 750 and 1500 V. For indoor and outdoor fixed laying cables should be protected from direct exposure of solar radiation and mechanical damage.

CONSTRUCTION
1.Current-carrying – soft copper wire, corresponds to class 4 for sections of 0.35-0.5 mm2, class 3 for sections of 0.75-4.0 mm’ and class 2 for sections of 6.0-10.0 mm’ according to state standard GOST 22483-77.
2.lnsulation – polyethylene. Insulated cores have a distinctive color.
3.Twist – twisted in pairs of insulated cores.
4.lndividual Shield – braided screen made of tinned copper wire or twist of tinned copper wire.
5.Wrapping – polyethylene terephthalate, polyvinyl chloride, or polyamide film.
6.Sheath – polyvinylchloride.
7.Overall shield – tinned copper wire.