The load is now a boiler. (See Figure 4, page 20.) This wiring diagram shows 120 V coming from L1 of a circuit breaker, through a switch, powering a boiler control and returning through L2, back to ...

Here’s what electricians want you to know about circuits, extension cords, GFCIs and more.

Stop walking across a dark room to turn on the light. Install a 3-way switch and control lights from two locations.

These long-standing safety devices may seem inconvenient when used incorrectly, but they're designed to save lives.

No one likes to be in the dark during a storm. Those who live in cities may not experience frequent power outages, but many ...