Generally speaking, when connecting wire sockets, different wires will be embedded first, that is to say, there are live wires, zero wires and ground wires. Make clear the zero line and the fire line first. You need to set the multimeter to the buzzer, and then connect the red probe with one of the wires. If there is a beep, it means that this is the fire line in your hand. If there is no beep, it is the zero line, and then mark the fire line.

Next, distinguish between the zero line and the ground line, and also adjust it to 500 volts with a multimeter. Hold the black stylus with one hand and touch the red stylus with the other. If the voltage display value is relatively high, it means that it is the zero line, and the voltage value of 0 is the ground line. Next, connect different wires with corresponding terminals. For example, the live wire will be connected to the L terminal, the neutral wire will be connected to the N terminal, and the ground wire will be connected to the E terminal.

2. What happens when the live wire, neutral wire and ground wire are connected backwards?

1. In general, the L end above the socket is on the right and the N port is on the left, which means that the left side is connected to the zero line and the right side is connected to the fire line. If the installation is wrong, it is likely that household appliances will not be used normally. And from a safety point of view, there will be some hidden dangers. Because the switch of the electrical appliance controls the live wire, if it is connected backwards, it will cause the switch to directly control the zero wire, and it will be charged in case of power failure. If the electrical enclosure leaks electricity and comes into contact with it, the risk of electric shock is likely to occur.

2. Even if there is no electric shock, some lights are wrongly connected, which is likely to lead to dim light when turning off the lights. Therefore, whether there is danger or not, you need to connect the wires correctly. You must pay attention to it and be responsible for the lives of yourself and your family.

Summary: before wiring, distinguish between live wire, neutral wire, ground wire and socket. Because there are not many kinds of wires, it is relatively simple, but it must not be confused and connected incorrectly.