GFCI outlets can be installed by the homeowner or by a certified electrician. The GFCI outlet replaces a current non-GCFI outlet; in new buildings, the GCFI outlets should be installed as necessary during building. If you have a particular circuit breaker that regulates power to a series of outlets in bathrooms or kitchens, you can also install a GCFI breaker, which will protect all the outlets it is connected to.
All GCFI outlets have a test button and a reset button, which are often in the center of the outlet. To test the outlet, press the test button and try using something plugged into the outlet. With the test button pressed, the outlet should not function. To restore power to the outlet, push the reset button. Test each GCFI outlet in your home monthly to make sure they are operating correctly. A GCFI outlet will not work if it is installed incorrectly, so if you have one that doesn’t work even after pressing the reset button, call an electrician to have it checked out and re-installed or repaired.
GFCI outlets are not intended to be used for washers or refrigerators; even though these appliances use water in the presence of electricity, they have their own special power outlets. If your home does not have the large, round, three-pronged outlets for these items, an electrician can install one for you.
Even when using GFCI outlets near a sink or other water source, plan carefully where to put the outlets. Don't position them where they are likely to be sprayed with water from a faucet or faucet hose, come into contact with water spilling over from a sink or tub or get wet from drying dishes or towels. Think about how you will use the space in question and which electrical devices you will use and where. Install outlets accordingly.