Should the neutral wire or the live wire be connected first when making electrical connections with

Should the neutral wire or the live wire be connected first when making electrical connections with the power on?

When making electrical connections with the power on, **the neutral wire must be connected first, and then the live wire**. This is because:

1. **Safety principle**

   Under normal circumstances, the neutral wire is at the same potential as the ground (with a voltage of 0), while the live wire carries a voltage of 220V. Connecting the neutral wire first can prevent accidental contact with the live wire during operation, which may lead to electric shock.

2. **Operation logic**

   After the neutral wire is connected, the circuit is in a relatively stable state. When connecting the live wire, even if there is a brief contact, since the neutral wire is already conducting, the current will form a loop through the neutral wire, reducing the risk of harm to the human body.

**Precautions**:

- Unless it is an emergency, **it is strongly recommended to carry out the operation with the power cut off**, and it should be completed by a professional electrician.

- If it is necessary to operate with the power on, you need to wear insulating gloves and shoes, use insulating tools, keep one-hand operation, and avoid touching different wires simultaneously.

- After the connection is completed, use a multimeter to confirm that the voltage is normal and avoid connecting the neutral wire and the live wire in reverse.

**Safety reminder**: Electrical operations pose a high risk. Non-professionals should not attempt to work with the power on. Safety always comes first!