Test your non-contact voltage tester on a known live circuit to ensure it works ... and one wire goes out to the light(s). A 3-way switch adds two terminals for travelers, which connect two ...

The most basic three-way switch setup has two switches that ... for the lighting circuit to function, ordinary switches don't require this connection. Smart light switches, though, tend to need ...

⚠️: Working on a live electrical circuit can cause serious injury or death. Go to the main electrical panel and flip off the circuit breaker that’s feeding power to the light switch.

There are two types of light switches, says Donnelly: a single-pole light switch, which has two wires, and a three-way light switch ... come into contact with the wiring, which is a high fire ...