How To Wire a 3 Way Light Switch | Family Handyman Wiring a three way light switch. Wiring of 3-way light switches 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. With a pair of 3-way switches, either switch can make or break the connection that completes the circuit to the light.Author: The Family Handyman 3-way Switch Wiring - Electrical 101 Typical 3-Way Switch Wiring, NM Cable. In the 1st diagram below, a 2-wire NM cable supplies power from the panel to the first switch box. The black (line) wire connects to the common terminal of the first 3-way switch. A 3-wire NM connects the traveler terminals of the first and second 3-way switch together. Wiring a 3-Way Switch - how-to-wire-it Each 3-way switch in these examples are controlling the power source to the same load. When wiring a 3-way switch circuit, we will be using a 3-wire cable known as romex coming from the source (such as the breaker box). Then a 4-wire cable going between the two 3-way switches and then a 3-wire cable going from the switches to the load. 3 Way Switch Wiring Diagram | House Electrical Wiring Diagram This article explains a 3 way switch wiring diagram and step How to wire three way light switch electrical circuit We have to discuss about what are the three ways for wiring diagram as discussed below and how to connect all the lights and what are the different techniques to join such switches to getour own desired outputs as mentioned below. Wiring Diagram For 3 Way Light Switch | Electrical wiring House Wiring 3 Way Light Switch Fun with electricityng a three way switch Light is controlled by two three-way switches with the light between the switches and the power first going through a switch, then to the light, and onto the second three-way switch.