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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.

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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