Install leakage switch or air switch first?

- Apr 29, 2020-

Install leakage switch or air switch first?


Too many people pretend to be wrong! Install leakage switch or air switch first?


Air switch is a kind of protector which can protect when the current is overloaded or short circuit occurs. It is also called air circuit breaker. In use, as long as the current passing through the line does not exceed the maximum current allowed by the air switch, even in case of leakage, the air switch will not automatically trip to cut off the current in the line.

Install leakage switch or air switch first 1


The leakage switch is a kind of air circuit breaker with special protection function. The special protection function refers to leakage protection. The real professional name is residual current protection device. In addition to the basic performance of the air switch, it can also cut off the switch quickly when leakage occurs in the load circuit, so as to avoid harm to human body and adverse impact on electrical equipment, and play a protective role.

Install leakage switch or air switch first 2


In real life, the air switch is used as the main switch, while the leakage switch is used as the branch switch. Therefore, the normal installation sequence is air switch first, then leakage switch. The reason for this is that if the air switch is installed behind the leakage switch, once leakage occurs, the leakage switch will cut off the power supply, but the air switch will not respond at this time, which will lead to the situation of over tripping. In short, the leakage switch will trip and the air switch will not trip.


What are the consequences of switch over tripping? For example, if a home has four circuits, if the main switch is equipped with leakage switch, and each branch is equipped with air switch. So once the leakage of a circuit occurs, the power supply of the whole home will be cut off by the main switch and the power will be cut off, which will affect the convenience of home life. As for other aspects, it has little impact.


Therefore, it is recommended to install the air switch first and then the leakage switch.