3 Way Switch Wiring Diagram Power At Light. At each switch in the above 3 way switch wiring diagram the black wire gets connected to the common copper or black screw. 3 way switch wiring diagram depicting all wires in the ceiling junction box.
The ground wire goes through both switch boxes and the ceiling light box and it is connected at all junctions except the light with a pigtail short piece of wire and wire connector. In the 1st diagram below a 2 wire nm cable supplies power from the panel to the first switch box. Two three way switches control one light with the electric power coming through the first switch flowing to the second switch and then to the light fixture.
In the ceiling light fixture electrical box one black wire from a 3 way switch gets connected to the black load wire on the light fixture.
The black hot wire connects to the far right switch s common terminal. Step by step instructions on how to wire a switched outlet. Turn the power off at circuit breaker. Jan 24 18 02 09 pm.
