DIY

One turns lights on automatically when it detects a person, the other requires a manual push to switch on and only handles turning them off.

Removing the side fins to fit dimmers next to each other reduces how much load each one may control, and the derating table in the box states by how much.

Replacing five incandescent lamps with five efficient ones can drop total wattage under the threshold a control needs to regulate, producing flicker at low settings.

Manufacturers publish tested pairings because the interaction between a phase-control dimmer and a switching driver cannot be predicted from the ratings alone.

When a no-neutral device makes LED lamps glow or flicker, the answer is usually a small component installed at the fixture rather than a different switch.

In a traditional switch loop the white conductor carries power to the switch, which is why testing before touching matters more than trusting insulation color.

A four-way device swaps a pair of travelers and has no common terminal, so it only functions between two three-way switches and never at either end of the run.

The two matching screws carry the pair that runs between switches; the differently colored terminal is the pivot point and must be found before anything is wired.

When only the top or bottom of a receptacle has power, the usual cause is an intentional wiring choice that separates the two halves onto different sources.

The spacing rules exist so that no appliance ever needs an extension cord on a wet work surface, which explains every quirk in how the outlets are placed.