1, the incorrect use of electrical appliances. In the overloaded use of electrical appliances or the use of mismatched electrical appliances will occur abnormal heating phenomenon, high temperature can accelerate the aging of the insulation layer of the equipment line, shorten the normal service life of the equipment, reduce the equipment on the power supply abnormalities in the ability to resist, may be induced by leakage phenomenon.
2, electrical equipment replacement is not timely. In the purchase of household equipment can see the shelf life of the product, the date is generally the national standard, or manufacturers of the actual test of the safety of the use of time, in the shelf life of the equipment will not generally have a big problem, once beyond the shelf life must pay attention to the safety of the product checks, failures should be stopped in a timely manner.
3, electricity equipment near the accumulation of combustible materials. The use of equipment, there will inevitably be sparks, arcs and other phenomena occur, these "open fire" some of the normal phenomena, some because of equipment abnormalities, if the equipment near the flammable material, to a large extent, will cause electrical fire accidents.