In your home’s electrical system, the weak links are the hundreds of connections between electrical conductors (wires) and receptacles, switches and other devices, like lights and appliances ...

No matter which switch you flip, the light responds. You may find other configurations in your home. Hire a pro to diagnose anything you’re unsure about, but here’s how to wire a 3-way switch ...

GE Cync and Lutron Caséta are among the few smart switches that don’t depend a neutral wire. Single- or multi-pole: If the light you wish to control is connected to just one switch, then you ...