Three wire cable runs between the switches and 2 wire cable runs to the light.
Three way light wiring.
With a pair of 3 way switches either can make or break the connection that completes the circuit to the light.
As it is three way switching wiring connection we have used two switches one is ordinary 3 way switch and the second one is 3 way pilot light switch.
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.
First run a 2 wire cable from the wall power to the black screw on 1 of the switches.
The black and red wires between sw1 and sw2 are connected to the traveler terminals.
In this diagram the electrical source is at the first switch and the light is located at the end of the circuit.
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 switch wiring diagram line to light fixtureline voltage enters the light fixture outlet box.
To wire a 3 way light switch you ll need 2 3 way light switches 2 2 wire non metallic cables 1 3 wire non metallic cable and 2 6 inch grounding wires.
As the purpose of this 3 way switching wiring is that to control the light bulb from two different places same like the three way switching in staircase wiring while using pilot light switch.
Wiring diagram 3 way switch with light at the end.