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.
3 way light switch diagram.
This might seem intimidating but it does not have to be.
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.
Pick the diagram that is most like the scenario you are in and see if you can wire your switch.
Interested in a 4 way switch wiring diagram.
Wiring diagram 3 way switch with light at the end.
In this diagram the electrical source is at the first switch and the light is located at the end of the circuit.
The black and red wires between sw1 and sw2 are connected to the traveler terminals.
Three wire cable runs between the switches and 2 wire cable runs to the light.
With a pair of 3 way switches either can make or break the connection that completes the circuit to the light.
Now discussing 3 way light switch wiring diagram as also discussed above the color codes of the wires as having three insulated conductors as black as hot red as switch wire or called traveler and white as common wire as also shown when light is connected to both black and white wires.
With these diagrams below it will take the guess work out of wiring.
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.
This is the 3 wire cable which you must have to wire a 3 way.