A normal 120 volt outlet in the US has two vertical slots and a role hole centered below the slots -- the outlets with a pair of red and black 'test' and 'reset' buttons are known as GCFI outlets. Check out this HowStuffWorks podcast to learn more.
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Episode Transcript
Welcome to Brainstuff from how stuff works dot com where
smart happens. Hi Am Marshall Brain with today's question, how
does a g f CI outlet work? You probably have
one of these outlets in the kitchen or bathroom. It
has a red button on it. That outlet is called
a ground false circuit interruptor or g f c I.
(00:21):
It
BrainStuff News
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Lauren Vogelbaum
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