AFCI protection must be installed for which circuits?

AFCI protection must be installed for which circuits?

• A. 120-volt, single-phase, 15- and 20-ampere branch circuits that supply outlets or devices in most every room of a dwelling unit
• B. All 120-volt circuits
• C. Only kitchens require AFCI protection
• D. Only outdoor outlets

Answer: (A)

AFCI protection targets the circuits that feed outlets or devices in living areas to reduce the risk of fires from arc faults. The rule applies to 120-volt, single-phase, 15- and 20-amp branch circuits that supply outlets or devices in most rooms of a dwelling unit. That means these living-space circuits must have AFCI protection, typically either with an AFCI breaker at the panel or an equivalent protection device. Why this fits best: it specifies the voltage, phase, and amperage range that commonly supply outlets or devices in living areas and covers most rooms in a dwelling, which is exactly what the AFCI requirement is meant to protect. It’s not all 120-volt circuits (some circuits that don’t feed outlets or are dedicated for specific loads may be treated differently), and it’s not limited to only kitchens or only outdoor outlets.

AFCI protection targets the circuits that feed outlets or devices in living areas to reduce the risk of fires from arc faults. The rule applies to 120-volt, single-phase, 15- and 20-amp branch circuits that supply outlets or devices in most rooms of a dwelling unit. That means these living-space circuits must have AFCI protection, typically either with an AFCI breaker at the panel or an equivalent protection device.

Why this fits best: it specifies the voltage, phase, and amperage range that commonly supply outlets or devices in living areas and covers most rooms in a dwelling, which is exactly what the AFCI requirement is meant to protect. It’s not all 120-volt circuits (some circuits that don’t feed outlets or are dedicated for specific loads may be treated differently), and it’s not limited to only kitchens or only outdoor outlets.