Five prevention: short for prevention of electrical misoperation, namely prevention of false opening and closing of circuit breakers; Prevent the handcart isolation plug of the metal enclosed (armored) switch cabinet from being pushed in and pulled out with the load opening and closing disconnectors or with the load; Prevent the electrified grounding wire from hanging or closing the grounding swit
In short, if low-quality wires are used, it will produce: 1. The wires are very hot; 2. The insulation is prone to breakdown or premature aging, resulting in electric leakage; 3. Large power consumption; 4. It is easy to cause fire and cause heavy casualties.