Nowadays, modern electrical appliances (such as electric blankets, air conditioners, and electric ovens) are increasingly used in homes. Due to poor cable quality, improper wiring layout, and haphazard wiring, long-term overload of wiring can lead to short circuits and sparks. So, what causes cable aging?
Causes of Wire and Cable Aging
1. External damage. Recent operational analysis shows that a significant number of cable failures, particularly in rapidly developing metropolitan areas, are caused by mechanical damage.
2. Moisture damage to insulation is also common, typically occurring at cable joints in direct burials or exhaust pipes.
If cables are buried directly in acidic or alkaline areas, the cable's armor, lead, or outer protective layer can corrode. Long-term chemical or electrolytic corrosion can lead to ineffective insulation and ultimately cable failure.
2.5 square wire
2.5 square wire
3. Long-term overload operation. Due to the thermal effect of current, when load current passes through a cable, it inevitably causes the conductor to heat up. Furthermore, the skin effect of charge, eddy current losses in the steel armor, and dielectric losses also generate additional heat, raising the cable temperature. During long-term overload operation, excessively high temperatures can accelerate the aging of the insulation layer and even cause it to crack. Especially in the hot summer months, the temperature rise of the cable often leads to the breakdown of the weak insulation layer, resulting in more cable failures in the summer.
Fourth, cable connector failure. The cable joint is a weak link in the cable line, and cable joint failure is often directly caused by the construction worker's mistakes (poor construction quality). During the cable joint production process, if the joint is not crimped tightly and is not heated enough, the insulation of the cable head will be reduced, leading to accidents.
To save costs, many people tend to choose low-cost cables, but they don't realize that low-quality cables not only affect the normal operation of daily appliances and wiring, but once quality problems occur, it is easy to encounter difficulties and rework, which will cost you time, money, and even endanger your life. To ensure the safety of appliances and personnel and reduce the maintenance costs of home renovations, it is necessary to choose cables that meet national standards.
