GFCI & Outlet Overview:

A GFI, or ground fault circuit interrupter, is an automatic device that offers personal protection against electrical shock. They are installed in areas where known electrical shock hazards exist... outdoor outlets and fixtures, swimming pools, saunas and hot tubs, outlets in kitchens, basements, bathrooms, and garages. Wherever there is the potential for contact between a person and an electrical appliance in or near moisture, water, or water pipes, a GFI should be protecting the circuit... and you! Inside of a GFI is a sensor that detects changes in current to the appliance by comparing the current flowing to the appliance and the current flowing from the appliance.  A drop off in the current equivalent to about 5 milliamperes turns off all power by tripping a relay within the GFI within a few hundredths of a second. You might hardly even feel the shock, it happens so quickly! However, there is still a danger since 5 milliamperes can cause a "jerk reflex" or spasm in the muscles.  This is not too bad if you are standing on the ground but potentially dangerous if you are on a ladder or roof! GFI's can be reset to restore power to the affected circuit.  If the problem still exists, though, the GFI will not reset.

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