Reasons and characteristics of fire caused by wire and cable

Home appliances can not be separated from the wires, especially the old houses, but the wires are small and “responsible” is significant. A lot of fires are caused by the aging of the power lines, their unreasonable configuration, or the poor quality of the wires used. Therefore, consumers must polish their eyes when buying electric wires, carefully identify them and prevent them from occurring.

The manufacture of wire cables is completely different from the production of most electromechanical products. Electromechanical products are usually used to assemble parts into parts and then assemble multiple parts into a single product. The product is measured in units or pieces. Wire and cable is based on the length of the basic unit of measurement. All electric wires and cables are started from conductor processing. The outer layer of the conductor is insulated, shielded, cabled, sheathed, etc. to form wire and cable products. The more complex the product structure, the more layers are stacked.

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Causes of fire caused by wire and cable are mainly due to overload, short circuit, excessive contact resistance and external heat source. In the short circuit, local overheating and other fault conditions and external heat, the insulating material insulation resistance, loss of insulation, and even burning, and then cause fire. The main characteristics of wire and cable in fire are:

(1) The fire temperature is generally 800°C to 1000°C. In the event of a fire, the wire and cable will quickly lose their insulating ability, causing secondary electrical problems such as short circuit.

Therefore, causing greater losses;

(2) Conductor cables have greater overload capacity under the specified allowable ampacity;

(3) In the short circuit state, the wire and cable will instantly cause the insulating material to melt, burn, and ignite the surrounding combustibles.

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