How to lock the switch at home?

The main switch is usually the one next to the switch box, usually the largest one. Turn it off, turn off all the power in the room.

When the switch is in position, there is an insulation distance between the contacts that meets the specified requirements and obvious disconnection signs; When in the closed position, it can withstand the current under normal loop and abnormal current within the specified time.

In order to automatically cut off the circuit in case of short circuit or overload, switches and fuses are usually used in series. Sometimes the switch and fuse form an element, which is called a low-voltage load switch.

The "reset" switch was not pressed. The "reset" switch is a small square bump, usually flat. When the circuit is overloaded and tripped, this small square will pop up and protrude. Only by pressing this raised "reset" switch can the switch be pushed, otherwise it will not be pushed.

Some air switches have a detection switch in the following positions. This switch is used to detect whether the air switch can be used normally. According to the requirements, the switch should be pressed once a month. When the detection switch is pressed, the switch will automatically jump off. If it jumps, it proves that the air switch is normal. If it doesn't jump, it proves that there is something wrong with the air switch and it should be replaced in time.