Mining wires shielded for rated voltage 6/10 kV. Construction:Working and protective conductors: Copper multi-wire classes 5 or 5c according to PN-E-90160: 1988Screen on working cords: GP semiconductor rubber according to PN-E 29100: 1989Insulation: IEP heat-resistant rubber according to PN-E 29100: 1989The color of the insulation of the veins: NaturalScreen on the insulation of working cores: GP semiconductor rubber according to PN-E 29100: 1989..