A three-way switch has three terminals; a four-way has four. These control a light from two or three switch locations, such as at the top and bottom of a stairwell, at either end of a hallway, or in a large room with multiple entrances.

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

Sure, a 4-way is essentially two 3-ways in one device. Usually a 4 way switch has 2 (IN) screws and 2 (OUT) screws. Using one of the (IN) terminals is the same as the common terminal on a 3 way.

What is the purpose of a 4 way switch?

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.

What are 3 way switches used for?

A single pole switch is used to control the light in a small closet or bathroom. Its called a single pole switch because there are two wires connected or separated by the switch mechanism. Theres also a ground wire to protect against electrical faults.

How do I know if I have a 3 way switch?

A more positive way to identify a 3-way switch is to look at the body of the switch and count the number of screw terminals: a 3-way switch has three terminal screws plus a ground screw. Two of the terminals are a light color—bronze- or copper-colored—and are called travelers.

How do you install 3 way and 4 way switch?

1:586:53How to wire a 3-way switch/4-way switch system - YouTubeYouTube

What is the difference between 2 way and 3 way switch?

Both 2 Way and 3 Way switches are SPDT switches. But 3 Way switches have an extra pin called Grounding pin, which is not present on 2-way switches. 2 Way Switches have 3 screws, whereas 3 Way Switches have 4 screws. But irrespective of that, in both cases, you can employ 2 switches to control the load.