GFCI

The NEC requires that Ground-Fault Circuit Interrupters (GFCIs) be installed in many different rooms and locations in both public and private buildings. They are now required in bathroomskitchensappliance rooms or spaces, and garages.

In addition, they are required in basements, near swimming pools, hot tubs, or fountains, and in outdoor receptacles. While these requirements are most commonly met with GFCI dual receptacles, they can also be met with GFCI branch circuit breakers.

To comply with UL Standard 943, Class A, a GFCI must trip in the presence of a ground fault as small as 5 mA (±1 mA) within about 25 ms. The NEC requires that GFCI protection be available in the locations previously listed.

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