With the development and progress of the times, highly flexible cables are being used more and more widely. However, as they become popular in power supply lines across the country, their safety issues have gradually attracted people's attention. In particular, the occurrence of cable fire accidents in recent years has reminded people to pay special attention to the use of such cables. So, what are the causes of fire accidents involving highly flexible cables? Let's take a look together.
Impure or Unqualified Cable MaterialsThe core conductors of cables are usually made of conductive materials such as copper or aluminum. During the production process, many manufacturers often use unqualified materials or those with insufficient purity as substitutes. This leads to reduced conductivity due to excessive impurities. Therefore, the materials used for core conductors must be high-quality conductive materials, mainly copper and aluminum.
Non-compliant Insulation Material Composition or Improper ProcessingIt is known that core conductors are usually wrapped by insulating materials outside the cable. If the quality of the insulating material is unqualified, its voltage resistance performance will be reduced, resulting in non-compliant resistance values. In addition, long-term use will shorten its service life, and short-circuit faults are likely to occur, causing fires.
Improper TransportationMost cables undergo strict quality inspections before leaving the factory. However, due to the lack of proper protective measures during transportation, they are squeezed and collided, resulting in damage to the insulation layer or breakage of the internal core conductors.
Non-compliant Nominal Cross-sectional Area of Cable Core ConductorsGenerally, the specified nominal cross-sectional area is larger than that of the actually produced cables. Cables with nominal values lower than the standard will have a higher current density per unit area. During operation, such cables are prone to fire because they cannot dissipate heat normally.
Poor Cable Production TechnologyAlthough not all manufacturers are like this, some businesses in the market inevitably cut corners to seek personal gains by failing to operate in strict accordance with standards during cable production. Some even use inferior materials for shoddy manufacturing, resulting in cables with substandard quality that cause fires during use.
