So what you should see if you have correct 3 wire electrical cable romex is a black power white neutral and now a 3rd red wire. Here a receptacle is added to the 3 way circuit before the first switch.
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Diagram to add an outlet to a 3 way circuit.
3 way switch wiring diagram power at switch and outlet. The white wire of the cable going to the switch is attached to the black line in the fixture box using a wire nut. Traveler wires are interchangeable. The source hot neutral and ground are spliced to a 2 wire cable that runs to the new outlet.
A 3 wire nm connects the traveler terminals of the first and second 3 way switch together. In the 1st diagram below a 2 wire nm cable supplies power from the panel to the first switch box. 3 way switch wiring diagram with power feed via switch.
In the above diagram the white wire must be re identified as a hot wire at each switch location. It is not controlled with the switches but is instead always hot. 3 way switch diagram 2 above shows the electricity source starting at the fixture.
3 way switch wiring diagram with line and load in the same switch box. An example of three way switch wiring with the line and load in the same 4 square electrical box. The power source also connects the terminal main three way switch and means that you need to have it spliced with a 3 way switch with the wire cable and that you will see the way that there is a neutral.
Typical 3 way switch wiring nm cable. The white wire between switches is not being used as a neutral. Regardless of what 3 way switch wiring diagram you re following you ll need to use a 3 wire cable to connect the two 3 way light switches.
The white wire becomes the energized switch leg as indicated by using black or red electrical tape. The black line wire connects to the common terminal of the first 3 way switch. You will see what you need to do when the power is coming to the light switch.
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