What is the difference between single pole and three-way switches?

The distinction between a single pole switch and a three-way switch is primarily based on their functionality and the number of locations from which they can control a light fixture. A single pole switch is designed to control a light from one location only. This means that when you close the circuit, the light turns on, and when you open it, the light turns off. It's the simplest type of switch commonly used in residential wiring.

On the other hand, a three-way switch allows for controlling a single light from two different locations. This is particularly useful in hallways or large rooms where you might want to turn the light on or off from both ends. The three-way switch does this by using a combination of switches and special wiring configurations that enable the light to be controlled from multiple points.

Understanding this key difference helps in planning lighting layouts and switch locations effectively in residential wiring projects.