Can a cable heat up even when its not loaded?

As people's knowledge of cables keeps increasing, in our daily life or work, we may encounter a situation where a certain section of the cable gets hot when it is not under load. The resistance at the heated part drops, causing a short circuit in the cable. This may lead to the insulation layer being punctured, resulting in electric shock to the circuit. In severe cases, it may even cause a fire. Now, let's learn together with the editor about why cables get hot!

I. Causes of Fever

1. Poor contact

When installing the line, if the contact with the installation point is loose, after the cable is powered on, the resistance of the conductor will increase, heat will be dissipated between the contact points, and the surrounding insulation layer will be damaged and cracked, eventually causing the cable to leak electricity.

2. Too dense installation

When renovating home circuits, there is often a problem of not installing the lines as required, resulting in cables being placed too closely together, which affects the normal heat dissipation of the cables. In addition, due to the overly concealed location of the cables, the heat is not easily dissipated and tends to remain in place, resulting in the cables heating up when there is no load. Or when the cables are close to other heat sources, it affects the normal heat dissipation of the cables and may also cause the cables to heat up.

3. Short circuit of the wire

Poor quality of the insulation layer of the cable, with damage and cracking, coupled with long-term exposure to a damp environment, will cause leakage of electricity in the cable and lead to overheating of the cable. Guoyou Cable Group attaches great importance to product quality and has established a strategic cooperative relationship with picc (People's Insurance Company of China). The product quality is guaranteed and it is a trustworthy big brand.

Ii. Solutions

After the cable is powered off, it is necessary to check whether the insulation layer is intact. If it is severely damaged, the cable should be replaced in time. At the same time, after the power is cut off, find the hottest part of the cable and re-wrap it with pvc insulating tape or related materials. The wrapping and winding layer should be no less than 15 layers to effectively protect the normal use of the cable.