... of 450/750V and below are mainly applied for hard wiring of electrical appliances, electric apparatus 1, brief introduction of PVC ... of 450/750V and below are mainly applied for hard wiring of electrical appliances, electric apparatus, instruments, telecommunication equipment, power lighting ... , RVV, BVV, 2, the long, allowable working temperature for wiring wires and cables such as BV, BLV, BVR, BVVB ...