It protects that entire circuit, a safeguard that can be a nuisance when installed in older buildings. Another type of GFCI is the receptacle type which is installed in place of the conventional receptacle outlet. It has a reset and a test button usually placed between the two outlet ports. This method is common in many modern buildings. Another type of GFCI is the portable type which merely plugs into an existing three-prong grounded outlet and converts that receptacle to a ground fault protected receptacle.
Some models also come with extension cords for use around the outlet, or in damp locations.
Here at YSU many of our buildings are ground fault protected but some of the older ones were built prior to the newer codes. Maintenance personal often find themselves in situations where they are working in areas where there is water, dampness or other conditions that may present a shock hazard. In these instances ground fault circuit interrupters may be desirable but not readily accessible. To assure that all personnel are properly protected we are providing portable ground fault circuit interrupters that can be plugged into any regular outlet converting it into a GFCI circuit. Please take the time to read the instructions that come with these devices before you use them to assure that you understand the limitations of this piece of equipment.