Does an outdoor receptacle require AFCI protection under the 2023 NEC?

No. Section 210.12(A) of the 2023 NEC requires arc fault circuit interrupter protection for 120 volt, single phase, 15 and 20 ampere branch circuits supplying outlets or devices installed in dwelling unit kitchen areas, family rooms, dining rooms, living rooms, parlors, libraries, dens, bedrooms, sunrooms, recreation rooms, closets, hallways, laundry areas, and similar rooms or areas. Outdoors is not on the list, and neither are garages, unfinished basements, or detached accessory buildings.

The trap in the wording

The requirement follows the branch circuit, not the device. If an outdoor receptacle is fed from a circuit that also serves a bedroom or a living room, the whole circuit needs AFCI protection because the circuit supplies outlets in a listed area. Many exterior receptacles are tapped off an interior circuit for convenience, and that is exactly how an outdoor device ends up behind an AFCI breaker.

The reverse is also worth knowing. If the outdoor receptacle is on its own dedicated circuit that serves nothing inside a listed area, no AFCI is required in the 2023 NEC.

GFCI is a different story

Section 210.8(A)(3) requires GFCI protection for all 125 volt through 250 volt receptacles rated 150 volts or less to ground installed outdoors in dwelling units. There is no exception for a dedicated outdoor circuit and the 2017 exception for snow melting and deicing equipment on a dedicated branch circuit was removed in later editions. Section 210.8(F) extends GFCI protection to outdoor outlets supplying dwelling unit HVAC equipment.

Section 210.52(E)(1) requires at least one receptacle outlet at the front and one at the back of a one family dwelling, accessible at grade level and not more than 6 feet 6 inches above grade. Section 406.9(B)(1) requires a weather resistant receptacle in a listed while in use cover for outdoor damp and wet locations.

Where AFCI did expand

Do not read this as AFCI shrinking. The list in 210.12(A) covers essentially every habitable interior area of a dwelling now, and 210.12(D) requires AFCI protection to be maintained when a branch circuit in a listed area is modified, replaced, or extended. Dormitory units get their own requirement in 210.12(B), and guest rooms and guest suites in 210.12(C).

Field takeaway

Outdoor receptacles need GFCI, a weather resistant device, and a while in use cover. AFCI is only pulled in if the circuit also feeds a listed interior area, so a dedicated exterior circuit skips it.