First thing you need to do is determine what size the wire. I found a couple like that changing out my receptacles.
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2 whites and 1 black backstabbed into the outlet and the other white and 2 blacks tied together with a wire.
How to wire electrical outlet with 3 wires. Wires A – From what I can tell wire set A goes to another outlet or continue the feed for that line of power. Later in the evening I noticed the router turned off so I tested the voltage at the outlet and got some voltage but way less than 120. You and I must have had the same electrician wire our houses.
Wires B – This is the power coming to. Turned off the breaker and discovered 3 sets of wires going to the outlet. I am assuming they backstabbed 2 sets of wires and put the third on the screws.
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