Types of Switches and Dimmers
Be sure to select a switch that’s compatible with the circuit where you want to install it and your lighting needs. Here are the basic types of switches and dimmers.
Essential Light Switches
The most common household switch, a single-pole, has two terminals and simply turns power on or off. 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. A dimmer switch controls a light’s intensity. You can usually replace any single-pole switch with a dimmer. However, for a fan or fluorescent light, you should buy a special switch rated to control those devices.
Special Light Switches
In addition to the familiar toggle and rotary switches, specialty switches can do everything from turning on when you walk into a room to varying the speed of whole-house fans. Other special-duty switches can be time-programmed or let you know whether a remote light is on or off. Decorative switches include styles that rock, turn, or slide rather than toggle.
