GFCI Outlet — Reset, Testing, and Replacement Guide

A GFCI outlet is a safety receptacle that shuts off power within milliseconds when it senses current leaking to ground.

What It Is

A GFCI outlet looks like a standard receptacle but includes internal ground-fault protection plus test and reset buttons on the face. It constantly compares outgoing and returning current and trips if some of that electricity is taking an unintended path.

That makes it especially important in wet, damp, or grounded areas where shock risk is higher. One GFCI outlet can also protect downstream standard outlets if wired correctly.

Types

Common types include tamper-resistant indoor receptacles, weather-resistant outdoor receptacles, self-testing models, and slim-profile versions for shallow boxes. Some include indicators that show trip or end-of-life status.

Where It Is Used

GFCI outlets are used in bathrooms, kitchens, garages, unfinished basements, laundry rooms, crawl spaces, and outdoor locations. Local code determines exactly where they are required.

How to Identify One

Look for the test and reset buttons on the outlet face. If the receptacle will not reset, feels loose in the box, or has no power downstream after a trip, the device or circuit may need service.

Replacement

Replace a GFCI outlet when it fails testing, will not reset consistently, shows cracking or burn marks, or reaches the end of its reliable service life. Replacement should preserve line and load wiring orientation so protection still works.