Wiring a 4-Way Switch (DIY)
Introduction
Switches are one of the simplest electrical devices. When closed, current passes through it and a light, appliance or device turns on. When you open the switch, current has nowhere to go and the light goes off.
Wiring switches can be confusing, especially with three-way and four-way switches. Three-way switches control light(s) from two locations, like the top and bottom of a stairway. When you add a four-way switch into the circuit, you can control light(s) from three locations, like the entrance to a big family room with three doors from the kitchen, the hall and the back porch.
Here we'll show you how to wire a four-way switch. Four-way switches must be installed into the circuit in between two separate three-way switches. We brought power to the first three-way switch box, which is common, but other configurations exist.
Before starting any electrical project, plan your circuitry and the best route for cables. Type NM cable (nonmettallic sheathed) is expensive, so do some homework and make sure you buy the correct size and quantity of cable. And, most importantly, make sure power is off by testing all circuits with a non-contact voltage tester.
Always consult a licensed electrician if you need help. Safety first; this project is not for a novice DIYer.
Tools Required
Materials Required
- 14/2 with ground nonmetallic-sheathed cable
- 14/3 with ground nonmetallic-sheathed cable
- 3-way switch (2)
- 4-way switch
- Electrical tape
- Single-gang box (3)
- Wire nuts
Note: this is a complicated wiring setup that requires a solid understanding of basic home electronics.
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