A typical solution to control a lighting load from two locations is to employ a pair of ? switches.

A typical solution to control a lighting load from two locations is to employ a pair of ? switches.

• A. Two-way
• B. Four-way
• C. Three-way
• D. Single-pole

Answer: (C)

Controlling a light from two locations uses two three-way switches. Each three-way switch has a common terminal and two traveler terminals, and flipping either switch changes which traveler is connected to the common. This creates or breaks the circuit path from the power to the lamp, so the light can be turned on or off from either end. A four-way switch is used when you need three or more locations, placed between two three-ways to extend the control. A single-pole switch handles the load from a single location only.

Controlling a light from two locations uses two three-way switches. Each three-way switch has a common terminal and two traveler terminals, and flipping either switch changes which traveler is connected to the common. This creates or breaks the circuit path from the power to the lamp, so the light can be turned on or off from either end. A four-way switch is used when you need three or more locations, placed between two three-ways to extend the control. A single-pole switch handles the load from a single location only.