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|GFCIs are recommended near any
source of water, in garages, and crawlspaces. We always look for and
test these. If installed in household branch circuits, they
could prevent over two-thirds of the approximately 300 electrocutions
still occurring each year in and around the home. Installation of the
device could also prevent thousands of burn and electric shock injuries
each year. The GFCI is designed to protect people from severe or
fatal electric shocks Because a GFCI detects ground faults, it can also
prevent some electrical fires and reduce the severity of others by
interrupting the flow of electric current..
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In the home's wiring system, the GFCI constantly monitors electricity flowing in a circuit, to sense any loss of current. If the current flowing through the circuit differs by a small amount from that returning, the GFCI quickly switches off power to that circuit. The GFCI interrupts power faster than a blink of an eye to prevent a lethal dose of electricity. You may receive a painful shock, but you should not be electrocuted or receive a serious shock injury.