8.3 GFCI Protection Requirements

Why GFCI Matters on the Arkansas JW Exam

Ground-fault circuit-interrupter (GFCI) protection for personnel is one of the highest-frequency Article 210 topics on state journeyman exams. For Arkansas Prov candidates testing on NEC 2023, outdated 2017/2020 memory is dangerous: kitchen GFCI scope widened, voltage ranges expanded to 125-volt through 250-volt receptacles in many dwelling locations, and appliance-specific GFCI lists grew.

GFCI devices open the circuit when they detect an imbalance between the current leaving on the ungrounded conductor(s) and returning on the grounded conductor — indicating current returning through a ground path (including a person). That is personnel protection against shock. It is not a substitute for equipment grounding, and it is not AFCI fire protection from arcing faults.

Tab 210.8, Article 100 definitions for GFCI, and related 406.4(D) replacement rules.

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What a Class A GFCI Does

Per Article 100, a GFCI is intended to protect persons by de-energizing a circuit when current to ground exceeds a predetermined value that is less than that required to operate the overcurrent device. Class A GFCIs (the type used for personnel protection on ordinary branch circuits) are designed to trip when ground-fault current is in the approximate 4 mA to 6 mA range. That trip level is far below typical breaker magnetic/thermal trip levels — which is why a standard breaker alone does not provide equivalent personnel protection.

Where GFCI protection is required, the device providing that protection (breaker or receptacle) must be readily accessible unless a specific Exception says otherwise. Buried GFCI receptacles behind appliances or locked enclosures fail the accessibility expectation Prov items often test.

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Dwelling Units — 210.8(A) Location List

210.8(A) requires GFCI protection for all 125-volt through 250-volt receptacles supplied by single-phase branch circuits rated 150 volts or less to ground and installed in the following dwelling-unit locations (verify the exact numbered list in your Code book — wording is exam-critical):

2023 kitchen change (exam favorite): GFCI is required for receptacles in the kitchen, including receptacles that are not countertop outlets (for example, receptacles for refrigerators, dishwashers when covered as receptacles in the kitchen, or receptacles below counters), subject to the voltage/ampere scope of 210.8(A).

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Other Than Dwellings, Specific Appliances, and Outdoor Outlets

210.8(B) covers other-than-dwelling locations (bathrooms, kitchens, rooftops, outdoors, sinks within 6 ft, indoor damp/wet locations, locker rooms, garages, etc.) with ampere/voltage scopes that can include higher branch-circuit ratings than dwelling 210.8(A). Journeyman stems sometimes drop a commercial kitchen or rooftop receptacle into an otherwise residential-looking question — open 210.8(B) when the occupancy is not a dwelling unit.

210.8(D) requires GFCI protection for the outlets supplying specific appliances (within stated voltage and ampere limits, single-phase and three-phase as applicable). The 2023 list expanded and commonly includes appliances such as automotive vacuum machines, drinking water coolers, high-pressure spray washing machines, tire inflation machines, and — critically for dwellings — electric ranges, wall-mounted ovens, counter-mounted cooking units, and microwave ovens within the section’s limits. Do not assume a hard-wired range is exempt just because it is not a 125 V receptacle.

210.8(F) addresses GFCI protection for outdoor outlets for dwellings (and related structures such as garages with floors at or below grade, accessory buildings, and boathouses) — broader than receptacle-only language in some cases. Note Exceptions (including time-limited HVAC-related Exception language in recent cycles). If the stem says “outdoor outlet” rather than “outdoor receptacle,” read 210.8(F) before answering from 210.8(A)(3) alone.

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Replacement Receptacles and Dual Protection

When receptacles are replaced in locations now requiring GFCI protection, 406.4(D) generally drives upgrade to GFCI protection (and often AFCI where 210.12 / 406.4(D)(4) apply). A stem describing replacement of a two-wire nongrounding receptacle in a bathroom or kitchen is a GFCI-upgrade item even if the original installation predated the rule.

Locations such as kitchens and laundry areas commonly require both GFCI (shock) and AFCI (arc-fault fire) protection. Dual-function AFCI/GFCI breakers or coordinated breaker/receptacle combinations are common practical solutions — the exam cares that both protections are provided, not which listed combination you prefer.

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Arkansas Open-Book Method

1. Identify occupancy: dwelling 210.8(A) vs other 210.8(B).
2. Check voltage: many dwelling receptacle rules now span 125 V through 250 V.
3. Match the location list (kitchen-all, laundry, garage, outdoor, basement, within 6 ft of sink, etc.).
4. If the stem names a specific appliance, check 210.8(D).
5. If the stem says outdoor outlet / HVAC / garage structure, check 210.8(F) and Exceptions.
6. Do not confuse GFCI trip purpose with AFCI waveform detection (210.12).

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Arkansas-Specific Amendment: 210.8(F) GFCI for Outdoor HVAC Is Excluded

Arkansas adopts the 2023 NEC through Rule 010.13-008 but excludes Section 210.8(F) — the GFCI requirement for outdoor outlets supplying air-conditioning and refrigeration (HVAC) equipment — from adoption. Arkansas does not enforce 210.8(F), so a GFCI is not required for an outdoor condensing-unit or heat-pump receptacle solely because of 210.8(F). On the Arkansas Prov exam, if a stem asks whether GFCI is required for an outdoor HVAC unit under 210.8(F), answer per the Arkansas amendment (excluded / not required), not the 2023 NEC text. The remainder of 210.8 — the dwelling location list in 210.8(A), other-than-dwelling 210.8(B), and appliance-specific 210.8(D) — applies as written. Carry this amendment as a tab note in your NEC 2023 book so you do not default to the national text on a timed Arkansas item.

Key Takeaways

• Dwelling GFCI scope is location-based and now commonly includes 125–250 V receptacles.
• 2023 kitchens: GFCI for receptacles in the kitchen, not only countertops.
• Class A devices protect personnel at low milliamp ground-fault levels and must be readily accessible.
• Appliance outlets and outdoor outlets have additional 210.8 subsections beyond the basic receptacle location list.