Ordinary wire insulation is generally made of polyethylene, polyvinyl chloride and other materials, and the allowable temperature of different insulation materials is different. For example, the maximum allowable temperature of PVC insulated wire under rated load is 70℃; The short-term maximum allowable temperature is160℃; The maximum allowable temperature of XLPE insulated wire under rated load is 90℃; The short-term maximum allowable temperature is 250℃ and so on.

Precautions for purchasing power cord:

The appearance of the power cord is qualified. The insulation layer is soft, tough and elastic, and the surface layer is dense, smooth, rough and pure in luster. There should be clear wear-resistant marks on the surface of insulating layer. For products made of informal insulating materials, the insulating layer feels transparent, fragile and inflexible.

Marking of wire surface According to national standards, the wire surface should be marked with continuous manufacturer's name, product model and rated voltage. This is conducive to finding the manufacturer in time when there are problems in the use of wires, and consumers must pay attention to this when purchasing wires. At the same time, consumers should pay attention to the manufacturer's name and product model indicated on the certificate when purchasing wires.