What is the reason for cable heating? How to purchase power cables?
When the temperature of the power cable is always high or exceeds the allowable working temperature during the load current period, if the cause is not identified and the fault is not eliminated in a timely manner, the cable will continue to operate, leading to insulation thermal failure, short circuit tripping, and fire. Power cable manufacturers have learned that cable heating during use may be caused by the following reasons:
1. Power cable manufacturer - The heating phenomenon of the cable during operation may be due to the conductor resistance of the cable not meeting the requirements.
2. Improper selection of cable type leads to a small cross-sectional area of the cable conductor, resulting in overload during use. After long-term use, the imbalance between cable heating and heat dissipation leads to heating.
3. If the cable is too close to other heat sources, it may affect the normal heat dissipation of the cable or the installation of power cables. If the arrangement is too dense, the ventilation and heat dissipation effect may be poor, which may also lead to heating during cable operation.
4. Poor production process of the connector, loose voltage connection, resulting in excessive contact resistance of the connector and cable heating.
5. Poor insulation between cables leads to low insulation resistance and can also generate heat during operation.
6. The partial sheath of armored cables is damaged, causing slow damage to the insulation performance after water ingress, resulting in a gradual decrease in insulation resistance and heating during cable operation.
To ensure the safe operation of power cables, it is recommended to consider the performance, layout, and surrounding environment of the cables when selecting them. Fire resistant cables can be chosen.
