@@xiaofengyan9907 There are different power system between North America and China. And this house entrance is 3 phrase 220v 4 wires .
@davidyuendavid9 ай бұрын
you can't swap the wire to use.
@hongmander6 ай бұрын
He put color tape to identify L. N. and E. so should be ok, Anyway the fault one already grounded so just use it for grounding. He smart ! Or spend a lot to break every thing down to fix ? The owner will love him.