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When the switch is installed, there is a short circuit inside, which causes the switch protection at home to trip.
It is possible that the roof of the bathroom is leaking, and the water enters the lamp port or the ballast, causing a short circuit. >>>More
The circuit is short-circuited, fortunately, just spare the fuse, the bathroom light is short-circuited, or the water touches the lamp, the zero line of fire touches together, and if you can't find a short circuit, you can find an electrician, and replace the melter by the way.
Checking the lines, insurance, and contacts everywhere must be thoroughly checked and dealt with.
Pull a live wire back to the corridor light from the three openings, and pull a zero line from the corridor light to the zero line of the kitchen or bathroom lamps and connect it. Hope it helps.
Don't you have any napkins at home?
Otherwise, if you're home alone, you can stand up and look for it. >>>More