Pretend the breaker is housed within a breaker panel and the switch is in an appropriately sized box. In the tabletop demonstration below, I have 14/2 wire starting at a circuit breaker (position 1) and going to a single-switch (position 2) that controls a bank of recessed lights (position 3). You can usually find where to file for permits via links on your county government’s or state government’s licensing and permits web page. In some jurisdictions, only licensed master electricians can obtain these permits. While not required for a tabletop demonstration, most jurisdictions will require you to obtain a permit for electrical work that includes a new or extended circuit. There are actually several ways to install 3-way switches, and here’s a good resource with diagrams to explain alternate options. In today’s article, I’m going to show you a common lighting scenario with a single-switch and how to incorporate two 3-way switches. Converting a Single-Switch Circuit to a 3-Way Switched Circuit Pro-Tip: The common terminal is always a different color than the other two hot terminals. Rather than off and on, the switch toggles power between the two traveler terminals. The traveler terminals are used to interconnect two 3-way switches on the same circuit, and the common terminal supplies (or dumps) power. How 3-Way Switches Workģ-way switches are named for the fact that each switch has three hot terminals- two traveler terminals and one common terminal. 3-way switches allow you to control a circuit from two different locations, and they’re commonly used for lighting to conveniently turn the lights on and off from two different places. You can actually achieve that functionality by converting a single-switched circuit to a 3-way switched circuit without too much work. If you’ve ever thought, “I wish I had another switch for this bunch of lights,” then you’re not alone.
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