GOST 6323-79.
Cables are designed for electrical installations for stationary laying in lighting and power networks as well as for the installation of electrical equipment, machines, mechanisms and machines for a rated voltage of up to 450V (for networks up to 450 ÷ 750V) with a frequency of up to 400Hz or a constant voltage of up to 1000V.
The conductor is a copper wire.
Insulation: polyvinyl chloride plastic. The color of the insulation is different; the color is solid or is made by applying two longitudinal strips on an insulation of natural color which are located diametrically. The wire used for grounding circuits has a yellow-green insulation.
The construction length of the wires is not less than 100 m, short-lengths of at least 20 m in length of 10%.
Operating temperature range: from minus 50 ° С to plus 70 ° С.