Why does the opening in the corridor always trip?

The leakage protector controls the switch by detecting the current difference between the ground wire and the live wire in the circuit. When there is electric leakage in the live wire, the current flowing through the live wire is large, but the current flowing through the live wire is small, so that the magnetic flux around the core of the leakage protector changes, the switch is automatically turned off, and the circuit is cut off. It is not difficult to see from the above explanation that the protection functions of air switch and leakage protector are different. The current of your water heater is more than 40A from the power calculation, so it is overcurrent trip protection. However, if there is no action current, the leakage protector will not act. It should be reminded that the allowable current of the leakage protector is 32A, and it will burn out if it takes too long. It is recommended that you replace it with an empty drive. Open circuit should be bought at the current of 1.5 times. As long as the current demand is met, only the leakage current is considered.