The mains power we use is alternating current. The air conditioner's incoming wires should normally consist of two wires, one for fire and one for zero. Only direct current is called positive and negative.
The situation you mentioned should be that the neutral wire of the incoming line is disconnected and key inspections need to be carried out; When measuring the neutral wire, it looks like a live wire, which means the live wire passes through the circuit breaker → live wire → electrical switch → electrical appliance → neutral wire When it reaches the neutral end of the breaker, use a test pen to measure the neutral end of the breaker and it will glow like a live wire.
Connect one of the three switches of the three-phase switch to the live wire and leave the other two inactive.
1. Switch wiring methodthree-phase pneumatic: Connect one of the three switches of the three-phase switch to the live wire and leave the other two inactive. The specific operations are as follows:
1. Turn off the power to the circuit.
2. Connect the live wire from the power supply to the terminal of the selected three-phase switch.
3. Then remove the live wire from the other bottom port and connect it to the socket.
When installing an indoor circuit breaker, you must confirm the type of power supply you are using. In other words, it depends on the power of the electrical devices used.
If the power supply and switch are not suitable, they will not be installed. Even if they are installed, it may cause hidden dangers.