Discuss the differences between single-pole and three-way switches.

A three-way switch provides the unique capability to control a single light fixture from two different locations. This is particularly useful in larger rooms, hallways, or staircases where you may want to turn on or off the same light from multiple points. The design of the three-way switch includes an additional terminal that allows it to connect to another three-way switch, creating a circuit that supports this dual control.

In contrast, a single-pole switch is designed to control a light or device from one location only and is the most common type of switch used in household circuits. It has two terminals and simply opens or closes the circuit to control the flow of electricity to a single fixture or device.

Understanding this functionality is crucial for anyone working with electrical installations as it directly affects the design and usability of lighting control in various settings.