What is the difference between a single-pole and a 3-way dimmer switch?
When choosing a dimmer, there are a few different options that you can choose from. The two main dimmers to choose from are a single pole and a 3 way dimmer switch. A single pole dimmer switch, also referred to as a single-pole single-throw (SPST) switch, controls a singular circuit and is either "on" or "off." These dimmers are usually ideal in places with a single point of entry including a bedroom, bathroom, or an office. On the other hand, a 3 way switch, which can also be referred to as a single-pole switch double-throw (SPDT) switch, alternates between two circuits instead of keeping a light "on" or "off," meaning the light can be changed in two separate locations. These dimmer switches are usually used in locations such as hallways or stairwells.