3 Way Switch Loop Diagram. One 3 way switch must have the circuit power supply ungrounded conductor aka hot attached to its common screw and the at the other end of the switch circuit another 3 way switch must have the switched fixture feed ungrounded conductor aka hot attached to its common screw. A 3 wire nm connects the traveler terminals of the first and second 3 way switch together.
Traveler wires are interchangeable on each switch. 3 way switch wiring diagram depicting all wires in the ceiling junction box. See alternate 3 way switch wiring configuration for another way 3 way switches may be wired.
A 3 wire nm connects the traveler terminals of the first and second 3 way switch together.
This 3 way switch wiring diagram shows how to wire the switches and the light when the power is coming to the light switch. Switch loops are very difficult to grasp when you re new to the trade and in this show. In the above 3 way switch wiring diagram at each switch the black wire gets connected to the copper or black screw. This episode is something a lot of green apprentices need to watch.
