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My Blog
Brad Stringer, BA, MBA: Posted on Sunday, March 20, 2011 3:26 PM
GFCI's & AFCI's For Improved Safety Of Residential Electrical Systems  GFCI stands for Ground Fault Circuit Interuptor and AFCI stands for Arc Fault Circuit Interuptor. These devices are designed to minimize the potential for electrical shock associated with an electrical ground fault, or "short" as it is commonly known, as well a potential for fire in the event of an "arc" between the hot and neutral of the system.  GFCI's are required at any receptacle in close proximity to water, such as kitchens, bathrooms, exteriors, and even the garage. It works by comparing the current flow through the receptacle from the hot to the neutral. If it senses a difference, it trips the GFCI. GFCI's can also be found at breakers in the breaker panel and can protect every receptacle on that particular circuit, so just because you do not see them at the required locations does not always mean they are not present. AFCI's are a fairly recent addition to the residential building code and are typically found integral to the breakers at the panel. AFCI protection is currenlty only required on bedroom circuits due to the potential for arcing and ignition of curtains and window covering typically found in bedrooms. These devices sense for arcing anywhere in the circuit, so even if the fault is at a connection in a junction box, damaged extension cord, etc, it should trip, limiting the likelihood of a fire. Both of these devices are now required in modern construction, and retrofitting is required on any major remodels of existing dwellings. Upgrading on existiing electrical systems is advised as a safety upgrade. |
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