At the cable terminations and joints, due to the disconnection of the metal sheath and shield of the cable, the Guangdong cable factory makes the electric field distribution much more complicated than the cable body. There is axial stress in the electric field at the cable end, so it is necessary to use cable accessories to realize the continuity of the cable. And docking, that is, a connecting device that can meet certain insulation and sealing requirements.

The cable conductor resistance does not meet the request, < when the power cable passes a positive load current. Forming a cable in the operation of a fever scene.
 
2 The cable selection type is improper, and the conductor cross section of the formed cable is too small, and the overload phenomenon occurs during operation. After the temporary use, the heat and heat dissipation of the cable are unbalanced to form a fever scene.
 
3 When the cable device is placed too densely, the ventilation and heat dissipation effect is not good, or the cable is too close to other heat sources, which affects the normal heat dissipation of the cable, and may also form a hot phenomenon in the operation of the cable.
 
4 joint manufacturing skills are not good, the crimp is not tight, the contact resistance at the joint is too large, it will also form a cable fever.
 
5 The phase insulation function of the cable is not good, the insulation resistance is small, and the heating phenomenon will occur during operation.
 
6 The partial sheath of the armored cable is damaged. After the water enters, the insulation function is slowly destructive, and the insulation resistance is gradually reduced, which will also form a fever phenomenon during the operation of the cable.
 
After the power cable has a fever scene, if the fault is not found, the cable will continue to be connected to the power supply and the insulation heat breakdown will occur. Forming a cable-on-phase short-circuit trip scene, which may lead to a fire.
When the power cable passes the positive load current, it will definitely increase the heat followed by the load current, and the external temperature of the cable will be higher. If it is not processed in time, the result can be imagined. Such as: PVC (PVC cable, the core temperature is 70 degrees as the upper limit of the external temperature will be 510 degrees lower. Therefore, the cable external temperature below 60 degrees is basically safe from the power maintenance thinking, of course, the lower the temperature, the better .