Or flip a switch at the bottom of the stairs, and then again at the top. The next person, coming from either direction, must be able to turn the light on again. That’s where 3-way switches come in.

I must stress that there are many possible ways a set of three-way light switches can be connected. This step-by-step is reflective of a common wiring scenario and the one in my own home.

To achieve this higher level of electrical wizardry, you install four-way switches in between the two three-way switches in the circuit. A four-way switch has four screws on it, plus the green ...

To achieve this higher level of electrical wizardry, you install four-way switches between the two three-way switches in the circuit. A four-way switch has four screws on it, plus the green ...

(The latest Wemo WiFi Smart Light Switch 3-Way is an exception to that rule, and it can also be used in a single-pole installation. It cannot, however, dim a light.) In this how-to, we’ll ...

Add/Relocate 3 Way Switch without Rewiring - Simply wired between the power and lighting fixtures; no complex in-wall rewiring or WiFi needed to add/relocate switch, pre-programmed for immediate use.

But now you can only get the lights to come on at one switch. Can you help me out of this mess? A. If it’s any consolation, you’re not the first person to goof up wiring a set of three-way ...

How three-way switching wiring is typically done wrong; How a three-way dimmer switch is wired differently from a standard three-way switch; and How to safely examine duplex receptacles and discover ...