What is a gfci outlet and where is one needed?

A GFCI ( G round F ault C ircuit I nterrupter) outlet is connected to a special electronic circuit breaker that compares the electrical current going OUT, across one of the wires to the amount of current coming back, across the OTHER wire. (that's the hot/neutral pair) That special electronic circuit breaker is called a Ground Fault Circuit Interrupter, or GFCI for short If at any point the current across the two wires does not match, the breaker will shut off the current to the outlet. The assumption is, (and it's a valid assumption) that if the current out does not match the current in, then electrical current is draining TO GROUND through something else... that something else might just be you.In other words, there is a ground "fault While a GFCI outlet is a good idea, unfortunately many people take unnecessary chances under the assumption that the GFCI will protect them.

But remember, electronic circuits do occasionally fail.

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