Will the hidden wires spontaneously ignite due to the aging of the lines?

There is an insulating layer and a protective layer outside the wire line to protect the conductive metal core. Electrical wiring aging refers to the situation that the insulation layer and protective layer of wires lose their insulation and protection functions under the action of long-term illumination, cold and hot shocks caused by temperature changes, corrosive gases, electrical loads and other factors.

To put it simply, because the wires are mainly insulated by the outer sheath and are corroded by external gas for a long time, the insulation performance gradually declines, gradually aging, hardening, becoming brittle or falling off. At this time, it can't play the role of heat preservation. The insulation layer on the surface of household wires is mostly made of plastic and rubber, which will age and lose its insulation effect after a long time of use.

The normal service life of general household wires can reach 10-20 years. The insulation performance of wires decreases after aging, which is easy to cause short circuit, especially in humid weather. Although the appearance of the wire is complete, the insulation performance has been degraded, and the short circuit will occur when moisture penetrates into the metal conductor, leading to a fire.

An example can prove that a fire broke out in a pig farm in Feidong County, Hefei City, Anhui Province on the morning of September 2002 1 7. In addition, the fire spread rapidly on a windy day, and the anxious pig farm owner Xu quickly called the police for help. The police in the jurisdiction immediately rushed to the scene to organize fire fighting. After more than 40 minutes of fighting, more than 600 pigs were saved.

Fortunately, the rescue was timely, and the fire did not cause much damage to the pig farm. It is reported that the cause of the fire is the aging of the line. In the morning, Xu, the owner of the pig farm, pumped water from the pond next to the pig farm. Due to the aging of the wires, it caused fever and spontaneous combustion, which ignited the feed warehouse of the pig farm and endangered the pigsty. You can imagine how terrible the aging of wires is.