What Is a Four Way Switch

: an electric switch used in house wiring so that a light may be turned on or off at three or more places.

What is a 4 way light switch used for?

4-Way Switches Four-way switches are used to control lighting from three or more locations. Four-way switches are used in combination with three-way switches. There are four terminals that provide two sets of toggle positions on a four-way switch.

Can I use a 3 way switch as a 4 way?

Three way switches usually work in pairs with two “traveler” conductors between them. Four way switches are made for the specific purpose of adding additional switches to the pair of 3 way switches. You can put as many of them between the two 3 way switches as you want, and they all work together in perfect harmony.