5.1 Branch Circuit Required Outlets (0401)

Branch Circuit Required Outlets (NEC Article 210)

Quick Answer: NEC Article 210 Part III sets where receptacle and lighting outlets must appear. For a commercial inspector the operative sections are 210.60 (guest rooms), 210.62 (show windows), 210.63 (servicing receptacles for HVAC and similar equipment), 210.64 (electrical service areas), 210.65 (meeting rooms), and 210.70(B) and (C) for non-dwelling lighting outlets — plus the non-dwelling GFCI list in 210.8(B). The dwelling rules in 210.52 and 210.12 still matter on mixed-occupancy and multifamily projects.

Start With the Non-Dwelling Rules

The E2 is a commercial exam, so learn this list first — it is where commercial required-outlet questions come from:

Those four servicing-receptacle rules (210.63 and 210.64) are among the most commonly missed items on a commercial final: the rooftop package unit has no receptacle within 25 ft, or the electrical room has no receptacle within 50 ft of the switchgear.

General Receptacle Spacing — 210.52(A)

In a dwelling, receptacles must be placed so that no point along the floor line of any usable wall is more than 6 ft (1.8 m) from a receptacle outlet. Wall space under 210.52(A)(2) is measured horizontally along the wall at floor level and includes fixed panels, but excludes sliding-door panels and windows. Any wall space 2 ft (600 mm) or wider must have a receptacle. Receptacle outlets in floors are permitted where fixed partitions exist, but floor receptacles are not counted toward satisfying the 6 ft wall rule unless the wall has no usable wall space (210.52(A)(3)).

Room-by-room minimums

Small-appliance branch circuits — 210.52(B)

Kitchens, dining rooms, pantries, and breakfast rooms require two or more 20 A small-appliance branch circuits to serve countertop and wall receptacles. These circuits shall serve no other outlets — no lighting, no HVAC, no receptacles outside the small-appliance area. A 15 A circuit is not acceptable as a small-appliance branch circuit. Countertop receptacles must be spaced so no point along the counter wall line is more than 24 in (600 mm) from a receptacle (210.52(C)(1)).

Watch the 2023 change on islands and peninsulas. The 2020 NEC required a receptacle for the first 9 ft² of island or peninsula countertop and another for each additional 18 ft². The 2023 NEC deleted that requirement: 210.52(C)(2) no longer mandates receptacle outlets serving island and peninsular countertop spaces, and instead governs where a receptacle is installed — it must not be in a face-up position in the countertop or work surface. If a question is written to the 2023 cycle, "an island receptacle is required" is the wrong answer.

Lighting Outlets — 210.70

Every habitable room, bathroom, hallway, stairway, attached garage, and exterior entrance or exit needs at least one switch-controlled lighting outlet. In dwelling habitable rooms (other than kitchens and bathrooms) the lighting outlet may be a switched receptacle.

GFCI Protection — 210.8

GFCI protection is required for 125-volt through 250-volt receptacles supplied by single-phase branch circuits rated 150 volts or less to ground, installed in the locations listed in 210.8(A) (dwelling units) and 210.8(B) (other than dwelling units). Note the framing: the rule is written by voltage and location, not by ampere rating, so the old "15- and 20-ampere" shorthand is out of date.

The non-dwelling list, 210.8(B), is the one an E2 inspector uses: bathrooms; kitchens; rooftops; outdoors; sinks (within 6 ft of the outside edge); indoor damp and wet locations; locker rooms with associated showering facilities; garages, service bays, and similar areas other than vehicle exhibition halls and showrooms; crawl spaces at or below grade; unfinished portions or areas of a basement not intended as habitable rooms; laundry areas; and bathtubs or shower stalls.

Getting the edition history straight matters, because exam questions are written to a specific cycle:

• 210.8(A)(5) was expanded from unfinished basements to all basements in the 2020 NEC, not the 2023.
• Laundry areas were added as 210.8(A)(10) in the 2020 NEC; 210.8(A)(7) is sinks.
• 210.8(F) covers outdoor outlets for dwelling units other than those already in 210.8(A)(3), supplied by single-phase branch circuits rated 150 V or less to ground and 50 A or less — the rule that pulled 240 V heat pumps and outdoor EVSE into GFCI territory.
• 210.8(D) requires GFCI on the branch circuit or outlet supplying listed specific appliances, such as dishwashers.

Required GFCI locations (dwellings)

AFCI Protection — 210.12

AFCI is required for all 120 V, 15 A and 20 A branch circuits supplying outlets or devices in dwelling kitchens, family rooms, dining rooms, living rooms, parlors, libraries, dens, bedrooms, sunrooms, recreation rooms, closets, hallways, laundry areas, finished basements, and similar rooms. Listed combination-type, outlet branch-circuit type (OBCI), or listed breaker-plus-outlet combinations are acceptable. Limited exceptions include fire-alarm circuits covered by 760.41(B) and 760.121(B), branch circuits supplying a fire pump, and the 2023 addition of an exception allowing a non-AFCI receptacle when a listed metal or nonmetallic conduit or tubing raceway is used for the entire run with a listed metal box. Branch-circuit extensions or modifications in any AFCI-required room trigger AFCI protection per 210.12(D).

Receptacle Configuration, Ratings & Tamper/Weather Resistance

• 406.12 — tamper-resistant (TR) receptacles are required in all dwelling units (15 and 20 A, 125 V), guest rooms of hotels and motels, and child-care facilities.
• 406.9 — weather-resistant (WR) receptacles are required in damp or wet locations; an in-use weatherproof cover is required for 15 A and 20 A receptacles in wet locations.
• 406.10 — grounding-type receptacles must be effectively bonded to the equipment grounding conductor.

Required Switches

210.70 covers switch-controlled lighting; Article 404 covers switch construction and rating. 404.9(B) requires the metal faceplate of a snap switch — and the switch yoke — to be effectively grounded, which is why a metal plate on a switch in a nonmetallic box with no equipment grounding conductor is a violation. In dwellings, a wall switch is required at each floor level and landing level containing an entryway where a stairway has six or more risers (210.70(A)(2)(3)). Dimmers must be listed for the load they control, and a general-use dimmer may not be used to control a receptacle.

Commercial (Non-Dwelling) Receptacle Requirements

210.60 applies the dwelling-style 210.52(A) spacing to guest rooms and guest suites of hotels, motels, sleeping rooms of nursing homes, and similar occupancies, but permits the receptacles to be located to be convenient for permanent furniture layout. 210.62 requires at least one receptacle within 18 in. of the top of a show window for each 12 linear ft of show window. 210.63, 210.64, and 210.65 — servicing receptacles, service-area receptacles, and meeting-room receptacles — have no dwelling analogue at all and are pure commercial-inspector material. Many E2 questions turn on exactly this line: the rule you cite changes the moment the occupancy stops being a dwelling unit.

Inspector Focus for the E2 Exam

For the commercial inspector, verify: (1) show windows have a receptacle for each 12 linear ft (210.62); (2) every HVAC/refrigeration unit and every piece of indoor service equipment has a servicing receptacle within 25 ft (210.63), not fed from the load side of its own disconnect; (3) the electrical service area has a receptacle within 50 ft (210.64); (4) GFCI is present in every 210.8(B) location and tests functional; (5) TR and WR markings are visible where required; (6) lighting outlets and switching exist in every 210.70(B) and (C) location; and (7) on the dwelling portions of a mixed project, the 6 ft spacing rule and the AFCI list are satisfied.