A ground fault circuit interrupter (GFCI) is a safety device that monitors the flow of current to and from an appliance. If there’s more current flowing to an appliance than coming back, it means that some is traveling to the ground—perhaps through you—and the GFCI will quickly cut power. You can still get a shock in the time it takes the GFCI to interrupt the ground fault, but you are less likely to be seriously injured.
GFCIs can be found in newer outlets and service panels and embedded in the cords of some appliances. Take a few minutes to find out where GFCIs are located in your home or school. Think about why they are located where they are.