(1) An electrical circuit failure causes a fire. In homes, electrical circuits often spark and arc or overheat insulated wires and cables and cause fires due to short circuits, overload operation, excessive contact resistance, leaks and other reasons. (2) Residents lack knowledge and awareness about the safe use of electricity. Some residents and family members lack knowledge of electrical fire prevention and pay attention to electrical safety. The main manifestations are: irregular operation when using household appliances; the operating voltage and current of the device do not correspond to the power of the socket used; the device is in working condition for a long time and does not turn off the power; in time after useion; multiple plugs are inserted into a socket or do not replace the plug in time when it is damaged; connect wires in a temporary residence without permission, destroy the original power lines at will during house decoration, and do not lay them down. in accordance with the requirements of building and installation regulations; do not install leak protectors in the house or add them at will. Thick fuses are made of copper, iron wire, etc. to replace household fuses. These behaviors can easily lead to electrical faults, loose plugs, aging circuits, and other problems that can lead to fires. (3) Substandard products and expired products increase the risk of fire. On the one hand, some families' household appliances have been used for too long, exceeding the safe use period, causing aging.ing the internal components of devices and causing short circuits, causing electrical products to burn due to a sudden increase in current. . For example, a resident once bought a fully automatic washing machine at a flea market, but it spontaneously combusted due to a short circuit during use, leaving only a pile of debris. On the other hand, some household appliances or electrical installations are of poor or substandard quality, and spontaneous combustion occurs during use and operation. Among them, the problem of substandard plugs is the most important.
What are the initial causes of electrical fires?
Poor contact causes excessive contact resistance, causing electrical fires. According to the request for relevant public information, in electrical circuits, the resistance de contact between wires and wires, wires and electrical equipment, wires and switch terminals, plugs and sockets, etc. are not connected correctly, rust occurs or there is an oxide. layer, which will cause contact resistance. Excessive size may cause an electrical fire. Electrical fires generally refer to thermal energy released due to malfunctions in electrical circuits, electrical equipment, household appliances, and power supply and distribution equipment: such as high temperatures, arcing, sparking and non-defective energy releases.
Initial causes of electrical fires:
1. Improper use of electrical appliances. Abnormal heating will occur when overloading electrical appliances or using unmatched electrical appliances. High temperatures cant accelerate the aging of the insulation layer of equipment lines, shorten the normal life of the equipment, reduce the resistance of the equipment to abnormal power conditions, and cause leakage. Phenomenon.
2. Electrical equipment is not replaced on time. When purchasing household equipment, you can see the shelf life of the product. This date is usually the national standard, or the safe use time actually tested by the manufacturer. During the shelf life, the equipment will generally not have any major problems. the shelf life is exceeded, you should pay attention to the product and safety inspections should be carried out and use should be stopped immediately if a malfunction occurs.
3. There is an accumulation of combustible materials near electrical equipment. When the equipment is in use, sparks, arcing and other phenomenas will inevitably occur. Some of these "open flames" are normal phenomena, and others occur due to abnormal equipment. If there are flammable materials near the equipment, it will largely cause electrical fires. .