What is arc-fault protection (AFCI) and where is it commonly required?

• A. Detects arc faults to reduce fire hazards and is commonly required for most living-area circuits in dwellings
• B. Protects against short circuits
• C. Steps to color code
• D. Optional in all homes

Answer: (A)

Arc-fault protection detects dangerous arcing in electrical circuits, which can generate heat and ignite insulation. An AFCI device monitors the current for the distinctive arc signature and trips to shut the circuit off before a fire starts. This safety feature is commonly required for most living-area circuits in dwellings, such as those in bedrooms and other main living spaces, to reduce fire hazards from arcing faults. It’s different from short-circuit protection (which handles overloads) and from GFCI (which detects ground faults to protect people). The option that states it detects arc faults to reduce fire hazards and is commonly required for most living-area circuits in dwellings is the best fit.