Ground fault circuit interrupters and arc fault circuit interrupters detect potentially dangerous flows of electricity and turn off instantly,before they can do any harm.Both can be breakers or outlets(test buttons on a breaker or outlet indicates that it’s G.F.C.Is or A.F.C.Is protected). Electrical codes require G.F.C.Is in areas that might be in wet locations ,Kitchens,bathrooms,outdoors,and garage,A.F.C.Is are required in all living areas.Remodeling projects could trigger these requirements,added safety to your home and major expenses to the project.