Solar cables are a large class of electrical products used to transmit power, transmit information, and achieve electromagnetic energy conversion. Solar cables play an important role in all economic activities and social life. The main problems of unqualified solar cables are the structure of the sheath, conductor size, conductor resistance, insulation, and tensile strength before aging. If such unqualified solar cables are used, there is a danger of electric leakage, electric shock, or even fire.

1. Cable single-phase grounding (short circuit) accident, the relay protection device does not act, cut off the fault so that the wire and cable overheating, causing the insulation layer fire.

2. Wire and cable with qualified tensile strength and elongation of the sheath insulation before aging. The tensile strength and elongation of the insulating sheath before aging are unqualified, which directly greatly shortens the service life of the cable, and during the construction process or in the environment of high temperature and long-term energization, the insulator is easy to break, causing the conductor to be exposed to the outside. Risk of electric shock and short circuit.

3. Wires with unqualified conductor resistance. Conductor resistance is mainly an important index to evaluate whether the conductor material and cross-section of the wire and cable meet. When the conductor resistance exceeds the standard, the loss when the current passes through the line increases, and the heating of the wire and cable increases.