Common faults in the use of wires and cables include mechanical damage, insulation damage, insulation moisture, insulation aging and deterioration, voltage overload, overheating and short circuit of wires and cables, etc. When the above-mentioned faults occur in the line, the main power supply of the faulty line should be cut off in a timely manner, and the fault points of the wires and cables should be quickly found. Possible faults should be checked and analyzed in a timely manner, and repaired and tested. After the fault is eliminated, power supply can be restored.

According to statistics, the most common cause of wire and cable failures is insulation breakdown. The main reasons for this phenomenon are:

1. Long term overload operation of wires and cables causes temperature rise, leading to insulation aging and ultimately resulting in insulation breakdown.

2. The process of the wire and cable joint does not meet the requirements, resulting in poor sealing at the joint and moisture entering the interior of the cable, which also greatly reduces the insulation performance; Or if effective protective measures were not taken during the cable laying process, resulting in damage to the insulation layer of the cable during the laying process.

3. The drainage at the cable laying location is not smooth, causing the cable to be soaked in water for a long time, which damages the insulation strength; Or the reserved space during cable laying may be too small, causing the cable to bend for a long time, resulting in the rupture of the insulation and sheath layers.

4. The protective layer of wires and cables has been subjected to chemical corrosion for a long time, resulting in the failure of the protective layer and a decrease in insulation performance, leading to short circuits.

5. The quality of the wires and cables used is poor, and they have not reached the end of their service life or have only suffered minor damage, which seriously affects their performance and leads to malfunctionssendBorn.

Therefore, selecting and using wires and cables correctly and reasonably plays a significant role in ensuring our electrical safety and the safety of life and property.