Along the way, the electrical current can stop the body's heart. Since the hand is connected to the body and the body is sitting in water, the body creates a relatively convenient path for the electricity to get to the water (electricity likes water because it's a pretty good conductor, providing easy travel). Another is that the dryer malfunctions and develops a short (say, a wire comes loose inside), allowing electricity to pass through the dryer's handle and into the user's hand. One ugly possibility is that the user drops the dryer into the water. Let's look at the classic example of a dimwitted (or seriously time-crunched) person using a hair dryer in a bathtub. A ground fault is a potentially dangerous (but not uncommon) situation in which electrical current follows an unintended path. Ground fault circuit interrupters do exactly what their name implies they interrupt a circuit experiencing a ground fault. Just to be clear on terminology, electrocution is a shock, and it's the last one you'll ever get, at least in this lifetime. The second reason is that GFCIs help protect against dangerous electrical shock, including electrocution. Most local building codes require GFCI protection on receptacles (outlets) and some other devices in wet areas, work areas and outdoors (more on that later). There are really only 2 reasons why you need ground fault circuit interrupters, or GFCIs, but they're both very, very good reasons.
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