For a 4 way light circuit to work you need two 3 way switches and at least one 4 way switch.
One light three way switch wiring diagram.
3 way switch wiring diagram depicting all wires in the ceiling junction box.
Wiring diagram 3 way switch with light at the end.
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.
With a pair of 3 way switches either can make or break the connection that completes the circuit to the light.
Wiring a 3 way light switch is certainly more complicated than that of the more common single pole switch but you can figure it out if you follow our 3 way switch wiring diagram.
In the above 3 way switch wiring diagram at each switch the black wire gets connected to the copper or black screw.
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.
3 way switch wiring diagram line to light fixtureline voltage enters the light fixture outlet box.
Sometimes it is handy to have an outlet controlled by a switch.
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With a pair of 3 way switches either switch can make or break the connection that completes the circuit to the light.
Step by step instructions on how to wire a switched outlet.
Wiring a 3 way light switch.
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Wire a switched outlet.
Three wire cable runs between the switches and 2 wire cable runs to the light.
No longer allowed after 2011 nec if no neutral wire in switch boxes 3 way switch wiring diagram light fixture between switchesline voltage enters the first 3 way switch outlet box light fixture is located between switch boxes no longer allowed after 2011 nec if no neutral wire in switch boxes.