What are the causes of the aging of wires and cables? (4)

5.Long term overload operation, due to the thermal effect of the current, the load current through the cable will inevitably lead to conductor heating, at the same time, the skin effect of charge and eddy current loss of steel armor, insulation dielectric loss will also produce additional heat, which makes the cable temperature rise. During long-term overload operation, too high temperature will accelerate the aging of the insulation, resulting in the breakdown of the insulation. Especially in the hot summer, the temperature rise of the cable often leads to the first breakdown of the weak part of the cable insulation, so in summer, there are many cable faults.

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