16/10/2026
Those TEST and RESET buttons are doing more than making an outlet look different.
A GFCI — ground-fault circuit interrupter — constantly compares the electricity leaving a circuit with what comes back. If a small amount starts leaking somewhere it should not, the GFCI can shut off power extremely quickly to reduce the risk of serious electric shock.
That is why you commonly see GFCI protection around:
• Bathrooms
• Kitchens and sinks
• Garages
• Exterior outlets
• Basements and crawl spaces
• Laundry areas
• Other damp or wet locations
Older homes may have fewer because these requirements were added gradually over decades.
And one important detail: an outlet does NOT need TEST and RESET buttons on its face to be GFCI-protected. It may be protected by another GFCI upstream or by a GFCI breaker in the electrical panel.
CPSC recommends testing GFCI receptacles monthly. If TEST does not shut off the power, RESET will not work, the device repeatedly trips, or an outlet feels hot or gives you a shock, it deserves a closer look.