Wire and cable overheating reasons and solutions!

Power cable through a certain load current, it will certainly fever, with the load current increases, the higher the cable surface temperature, if not treated, the consequences can be imagined. Such as polyvinyl chloride (PVC) cable, core temperature is 70 degrees as the upper limit of consideration, the surface temperature will be low 5 to 10 degrees. So the cable surface temperature below 60 degrees is basically safe, from the power maintenance considerations, of course, the lower the temperature the better. Cable in operation due to fever as follows:

1, the cable conductor resistance does not meet the requirements, resulting in the cable running fever.

2, improper cable selection, resulting in the use of the cable cross-section is too small, running overload, prolonged use, the cable heating and cooling imbalance caused by the phenomenon of fever.

3, when the cable is arranged too densely packed, ventilation and the cooling effect is not good, or the cable is too close to other heat sources, affecting the normal cooling of the cable, it may also cause the cable to generate heat in the operation of the phenomenon.

4, joint manufacturing technology is not good, the pressure is not close, resulting in contact resistance at the junction is too large, can also cause the cable to generate heat phenomenon.

5, the cable insulation performance is not good, resulting in less insulation resistance, the operation will have a fever phenomenon.

6, local damage sheathing cable, water damage to the insulation performance caused by slow, resulting in a gradual reduction of insulation resistance, can also cause cable running fever.

After the cable has a fever, if the cause is not found and the fault is not solved in time, the cable will have an insulation thermal breakdown after it continues to run continuously. Caused a short circuit between the cable tripping phenomenon, may cause the serious fire.

How to safely use the plug line?

The main reason that the plug wire uses electricity to heat up is that the electrical equipment is used for a long time, which increases the load of the electric wire. Special kind of multi-function socket, if at the same time connected to several high-power electrical types of equipment, then the socket power line must be overloaded, and in that case is very easy to burn the wire. Therefore, we must pay attention to the rational distribution of electricity, to regularly check the plug line and socket to see if the wires are old, the contact between the plug and socket is bad. Sometimes because of the production process is not sophisticated, the plug's thread will be weak, so plug the power supply will result in poor contact and lead to plug fever.

We should note that the plug is used for a long time will become old, the insulation properties will be reduced, it should be promptly replaced. For high-power electrical plugs, we recommend using the larger wire core, and it is best to use a grounding pin. If you find that the power outlet or the hotplug is very serious, which led to electrical burn, should not be reckless, be careful handling.