1, Conductor cross-section of the cable core does not meet the requirements. General provisions of the nominal interface is greater than the actual production of the cable, and the nominal value of the standard cable will have a larger unit current density, in the course of their work because the cable can not be normal due to heat and lead to a fire ACCIDENT.

2, cable production process is poor. The so-called non-trader no business, although not every manufacturer is so, but the market will inevitably have some businesses in order to seek personal gain in the production of cables in the process of not strictly in accordance with the standards of operation. Even some businesses will use some of the poor quality of shoddy products, resulting in the final production of the cable because the quality but off during the use of a fire.

3, the cable material impure or unqualified. Cable core is generally mainly made of some copper or aluminum conductive material, and many businesses in the production process will often use substandard or not enough purity of the material instead, which will lead to it because it contains more impurities and thus reduce electricity. Therefore, the material used as the core wire must be some good electrolyte material, generally copper and aluminum