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Because the lines were wrapped in tape by you, the lines were disconnected from each other and there was no electricity.
Is it okay to use 220V for household electricity, 4 for live wire, and zero for neutral wire? Don't do this with wiring at home.
First, separate the neutral line and the live wire that are connected together. >>>More
I've encountered similar problems before, so I'd like to help you solve this problem today. But I don't think you made it clear in the first place. >>>More
The neutral wire needs to be connected from the power supply, for example, if there is a neutral wire from a nearby outlet, you can split a wire out.
If the neutral and ground wires are reversed, if a leakage circuit breaker is installed in the circuit, the leakage circuit breaker will trip immediately after the load is inserted. Generally, the protection threshold of the leakage circuit breaker is 30mA, if the input current of your night light is greater than 30mA, it will trip.