When should arc-fault circuit interrupters (AFCIs) be installed?

Arc-fault circuit interrupters (AFCIs) should be installed in residential bedrooms and areas prone to fire hazards from arcing. This is because AFCIs are specifically designed to detect unintended electrical arcs that could lead to electrical fires. Bedrooms are particularly vulnerable due to the potential presence of flammable materials such as bedding, clothing, and other furnishings, making it crucial to have protection against all potential fire hazards.

While AFCIs can technically be installed in many locations, the primary intention behind their requirement is to enhance safety in areas where people sleep or where ignitable materials may be present, thereby reducing the risk of electrical fires caused by arcing faults. The National Electrical Code (NEC) and other electrical standards mandate that AFCIs be used in these specific areas to improve overall safety in residential environments.

Other options, such as the installation of AFCIs in commercial kitchens, outdoor installations, or exclusively in bathrooms and laundry areas, do not reflect the specific emphasis on protecting living spaces where individuals sleep and where the risk of fire from arcing is greater. Therefore, option B aligns correctly with safety protocols and regulations for preventing electrical fires.