... 450/750V and below are mainly applied for hard wiring of electrical appliances, electric apparatus, instruments, telecommunication equipment, power lighting, and buildings ... A. The highest temperature of the conductor is 70º C for the normal service of products such as BV, RV, RVV ... , BVV, VGV.B. The long, allowable working temperature for wiring wires & cables such as BV, BLV, BVR, BVVB, BLVVB ...