A 3-way switch is a type of electrical switch that is used to control a light fixture from two different locations. This type of switch is commonly used in hallways, stairwells, and other areas where it is convenient to be able to turn the lights on or off from multiple locations.
3-way switches are relatively easy to install and can be completed in a few simple steps. First, you will need to turn off the power to the circuit that you will be working on. Next, you will need to remove the faceplate from the switch and disconnect the wires. Once the wires are disconnected, you can remove the old switch and install the new 3-way switch. Finally, you can reconnect the wires and turn the power back on.