The core of the control cable is copper core, with a nominal cross-sectional area of 2.5mm2 or less, and 2 to 61 cores; 4-6mm2, 2-14 cores; 10mm2, 2 to 10 cores. The working temperature of the control cable is divided into two levels: rubber insulation at 65 ° C and polyvinyl chloride insulation at 70 ° C and 105 ° C. The control cables used in computer systems are generally insulated with polyvinyl chloride, polyethylene, cross-linked polyethylene, and fluoroplastic. Control cable is a PVC insulated and PVC sheathed control cable suitable for use in industrial and mining enterprises, energy and transportation departments, and for controlling and protecting circuits with AC rated voltage below 450/750 volts.