A GFCI stands for “ground-fault circuit interrupter,” which is an electrical device that reduces the danger of a deadly shock from a faulty plug-in cord or appliance. The device measures outgoing and returning current and shuts off the power if it detects a possible dangerous current imbalance. It has a test button that switches off the power to the outlet and any receptacles connected to it when it is pushed in. The device is required in all electrical outlets in the kitchen and bathroom of a house. It’s also required in all the wet areas of a house, like an unfinished basement, a laundry room or a garage, as well as outdoor areas and wherever there’s construction activity.
To replace a standard receptacle with a GFCI is not difficult and is a good first-time DIY electrical project. The device is inexpensive and the tools are basic ones you'll use time and again. An electrician will charge $174, including labor and materials, to replace two GFCI receptacles, but you can buy the two devices for $40, make the swap and save 77 percent. You’ll need a screwdriver, a wire cutting and stripping tool and an inexpensive voltage tester.
