What are the effects of failing cable insulation?

1. Will shorten the service life of wire and cable products, after long-term operation, especially direct burial, water immersion, open air or corrosion-prone environments, due to the long-term corrosion of the external medium, the insulation level of the thin point of the sheath and the mechanical level will be reduced. In addition, routine sheath testing or line ground faults may result in the thin points clicking through. This will lose the protective effect of the cable sheath. 2. internal consumption should not be ignored. Wire and cable generate a lot of heat when they are energized for long periods of time. Here to add a little common sense conductor allowable operating temperature of 70 ° C, PVC long-term use of temperature should not exceed 65 ° C. So wire and cable is actually in the middle of a long period of time, the cable is in the middle of a long period of time. So wire and cable is actually in a kind of "internal and external" state. If the quality is not pass, it will cause fire and other safety hazards. 3. Increase the difficulty of the laying process, more and more environmental requirements of high-voltage cable products must be small outer diameter, in the laying process need to be considered to leave a gap in order to dissipate the heat generated by the wire and cable energization. Cable is too large to increase the difficulty of laying, a feature of product quality is reflected in the quality of the appearance of the product. Whether power cables or simple cloth wire, in the production must pay attention to the quality of the insulation layer, and its strict control and inspection.

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