What type of switch allows control of current from two locations?

The correct answer is a three-way switch. This type of switch is specifically designed to control a single light or electrical load from two different locations. In practical applications, three-way switches are commonly used in staircases, long hallways, or large rooms, allowing a user to turn lights on or off from either end of the space.

The configuration of a three-way switch involves three terminals and requires a unique wiring setup, which includes connecting it to another three-way switch. This setup enables users to control the same lighting fixture from multiple locations, enhancing convenience and functionality in both residential and commercial settings.

In contrast, a single pole switch operates from only one location, controlling the circuit with a simple on/off mechanism. A double pole switch can control two separate circuits, but still operates from a single location. A dimmer switch changes the intensity of light and can control the brightness, but typically does not allow for control from multiple locations unless specifically designed with three-way capability.