Many modern smart switches, for example, can allow you to check on lights and turn them on or off with a smartphone app from anywhere you have an internet connection. The term smart switch refers to a new type of wall switch with internal circuitry that allows light fixtures or appliances to be controlled through one of several non-traditional means-such as by a voice assistant (such as Alexa) or by an internet app. Best for: Controlling a light fixture or appliance automatically or remotely.These switches are usually rated for 30 or 40 amps, rather than the 15 or 20 amps for standard single-pole wall switches.ĭouble-pole switches also have a green grounding screw for connecting the circuit's grounding wire. Compared to single-pole switches, double-pole switches are much less common in the home-it's possible you will have none at all if you don't have appliances that require one.īecause 240-volt circuits operate with two individual "hot" wires, these switches have four brass-colored screw terminals to allow control of both hot wires in the circuit-the incoming wires are attached to one set of screws, and the outgoing hot wires are attached to the other set of screws. But it can be found in some home wiring systems, where it is normally used to control 240-volt appliances, such as an electric furnace or air conditioner, an electric water heater, or a hot tub heater. The double-pole switch is commonly used in industrial applications. Best for: Controlling a 240-volt appliance or fixture from a single wall location.The Spruce Home Improvement Review Board.
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