Three Way Light Wiring

First run a 2 wire cable from the wall power to the black screw on 1 of the switches.

Three way light wiring. 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. Three way switches allow for controlling a light fixture from two separate locations these are usually used at the top and bottom of a flight of stairs or at two different entrances to a room. In this diagram the electrical source is at the first switch and the light is located at the end of the circuit. With a pair of 3 way switches either can make or break the connection that completes the circuit to the light.

The black and red wires between sw1 and sw2 are connected to the traveler terminals. This 3 way light switch diagram shows connections when the power comes into the first switch on to the second switch and then on to two or more lights switched by the 3 way circuit. Wiring a 3 way light switch. 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.

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. Three wire cable runs between the switches and 2 wire cable runs to the light. 3 way switch wiring diagram line to light fixtureline voltage enters the light fixture outlet box.