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A light switch is the simplest of electrical devices. Flip the switch, electricity flows. Flip it again, electricity stops. Lights on, lights off. That's great for a small room with one entrance.

In this video, I’ll show you how to wire up a light switch, whether it’s got 3 wires, 4 wires, or you’re adding a switch to a new construction. I’ll also cover wiring a light switch and outlet combo, ...