Question about Electrical Supplies
If the house GFCI trips only when the vanity receptacle circuit has power then likely the neutral and ground wires inside the vanity GFCI enclosure are in contact with each other.
To isolate the problem, suggest you pull the vanity GFCI receptacle out of the enclosure but leave all wires connected. Make sure no little hands can get near it. Then power on and see if it still trips the house breaker. If it doesnt trip then likely the vanity GFCI ground wire was touching the neutral.
Comment below for further assistance.
Posted on Aug 31, 2020
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