Does Photovoltaic Cables Heat Up For No Reason? What Can Be Checked?

It is normal for photovoltaic cables to heat up during use, but some people have found that even if electrical appliances are not used, the wires will heat up. What is the situation now? The wire heats up when there is no load. According to the analysis of our Cable, there are usually the following situations:

1. Short circuit of photovoltaic cables

Short circuit refers to the phenomenon of electric leakage, in-phase or relatively zero contact when the wire is electrified, and the current increases and heat is generated. For example, if the quality of the wire insulation is not good, it will leak if it is immersed in water for a long time; or if the wire insulation is damaged, it will leak if it comes into contact with a damp wall or steel bar, resulting in an increase in resistance and heating of the wire.

2. Photovoltaic cables connector is not well crimped

If the photovoltaic wire connector is in poor contact, the resistance of the wire connector will increase under the action of current, and the wire will also heat up when there is no load.

3. Photovoltaic cable laying is too dense and the ventilation is not good

According to the water and electricity installation specifications, the threading pipe occupies no more than 40% of the cross-sectional area of ​​the threading pipe. If the wires are routed too densely and the cross-sectional area exceeds 40%, the heat generated during normal use will not be easily dissipated, and there will be no load on the wires in the heat storage tube. In the case of wire heating phenomenon.

4. There is a heat source near photovoltaic cables

If the heating of photovoltaic cables are caused by a nearby heat source (such as a gas stove), effective insulation measures must be taken between the two.
Under normal circumstances, the wire will heat up when the load is running. The safe current carrying capacity of the wire is less than the rated power of the equipment. In this case, the only way to increase the cross-sectional area is to replace the wire.

5. The quality of photovoltaic cables are unqualified

Another situation is that the quality of photovoltaic cables are relatively low. The insulation value of the wire is low. Use a shaker to measure whether the insulation value can reach 0.5 megohms. If the insulation is too low, it will catch fire between the neutral wires and generate heat. Just replace the wires with new ones. , Discharging and heating of the wire will also cause the meter to lose the word and the electricity bill is high, so deal with it as soon as possible.

There are several reasons for unexplained heating of photovoltaic cables. If you want to know more news about wires and cables, please pay attention to our official website. We will continue to push you more news and information in the future.