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- Stands for Ground Fault Circuit Interrupter.
- Also known as a GFI or ground fault interrupter
- Used to protect against ground faults, which occur when a person comes into contact with a live electrical wire. This may be caused by worn insulation on a wire or by operating a faulty appliance or power tool.
- The GFCI interrupts power quickly enough to help prevent a lethal dose of electricity.
- To turn the GFCI back on after it trips, push the reset button located in the middle of the switch.
- They can be installed as a receptacle or at the main power panel.