What Ground Fault Interrupters are and what they do:
A ground fault interrupter is an automatic device built into an outlet that protects against electrical shock. They can usually be identified by the “test” and “reset” buttons in black and red, respectively, on the face of the outlet. GFIs are also available as circuit breakers that control a whole electrical circuit on the main circuit board of your home.
Where GFIs are used:
GFIs are usually installed where electrical shock hazards exist. Commonly, you will use them in outdoor outlets, kitchens, bathrooms, garages, basements, or anywhere there is the potential for contact between a person and an electrical appliance near or in moisture or water, or around water pipes.
How GFIs work:
The GFI contains a sensor that senses changes in current to an appliance by comparing the flow of electricity to the appliance with the flow from the appliance. A drop in current equal to about 5 milliamperes will trip a relay switch within the GFI and turn off all power to the appliance within a few hundredths of a second. Any shock you may feel will be minimal.
Why you need GFIs:
The danger of electrocution is much greater in homes that are not protected by ground fault interrupters. In fact, nearly 500 deaths a year occur from accidental electrocution. This is why so many states now require installation of GFIs in their building codes. It is an easy and inexpensive way to assure the safety of your family and loved ones.
What to do when a GFI trips:
If an imbalance in current flow is detected, the GFI will trip and power to the outlet will be cut off. To restore power, simply press the red reset button. If the electrical problem persists, however, the GFI will not reset, in which case you may need to call your electrical company or an electrician to identify and correct the problem.
The cost of GFIs:
Ground fault interrupters will cost on average several dollars more than standard outlets, but the additional protection of a GFI is well worth the money. GFIs can not only save your life, but can stop your expensive appliances from being “fried” by a power surge.
Installing GFIs in your home:
The most important thing to remember if you are ready to install GFIs in your home is that working with electricity can be extremely dangerous, even deadly. Even if you are handy around the house, electrical jobs are not something you should attempt without experience. To ensure that installation is done properly, it is always recommended that you hire a professional electrical contractor. A licensed and insured contractor will have the necessary experience to guarantee that your GFIs are correctly and safely installed.
