Wiring Diagram For A 3 Way Light Switch. With these diagrams below it will take the guess work out of wiring. Two wires between each switch.
Most likely to be found with wires in conduit. Two way switching allows you to control a light from two locations. The black hot wire connects to the far right switchs common terminal.
For a 4 way light circuit to work you need two 3 way switches and at least one 4 way switch.
In this wiring diagram the fixture is connected to the switches with three wire cables. Three wire cable runs between the switches and 2 wire cable runs to the light. Power at the 3 way switch. A two way light switch can also be used in in place of a one way light switch in this instance the red wire from the feed cable is connected to the common c terminal and the red wire going to the light is connected to the l1 terminal.