How to Wire a 4-Way Switch, Electrician Father Teaches His Son how to Wire his 1st, Thoughts?

You must use two, three-ways. [music] >> What does a four-way look like? >> A four-way looks just like that, but with another terminal. >> Correct. Now, let's think of this as we're going to make a sandwich. [music] Power is coming in on one side of that bun, and the light is coming out on the other side of the bun. What happens if we want to add another patty? We want to add another switch here. Let's assume that we've got a super long hallway. >> Four-way? >> Four-way. The only issue you have to deal with a four-way is make sure, and it does not matter how it's connected. You're basically you're just going to cut this. You're going to put one set of travelers on the top, [music] and another set of travelers on the bottom. That's it. How many four-ways can I add in here? Can I make a sandwich? Can I make a hamburger that's this big? >> Yeah. >> [music] >> Of course you can. And all you need to remember is the outer bun, baby. Whatever you put in the middle, all you're doing is controlling that lane of that highway. >> All it does. So, power [music] in, light out. >> So, two three-ways and a four-way. Remember that.