... electric cable of 450/750V and below are mainly applied for hard wiring of electrical appliances, electric apparatus, instruments, telecommunication equipment, power ... .A. The highest temperature of the conductor is 70ยบ 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 ...