3-Way Light Switches

A normal switch has two terminals that are either connected or disconnected. A three-way switch has three terminals, and the switch connects the first terminal to either the second or the third terminal.

To create lights that operate with two separate switches, the electrician uses two special pieces of equipment in the circuit:

Special switches known as three-way switches
Special wire that has an extra red insulated wire along with the black and white wires within the sheath

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