GFCI and AFCI locations, the Texas amendment, and the sentence that decides the item

Read the opening sentence first

Every subsection of NEC 210.8 opens with a sentence describing which circuits and which devices it reaches, and only then gives its list of locations. That opening sentence is what most items are testing, because the ratings in it change from one subsection to the next.

A commercial item handing you a 60 ampere receptacle is testing whether you know that 210.8(B) stops at 50. A dwelling item handing you a heavy receptacle is testing whether you noticed that 210.8(A) carries no ceiling, so the location and the voltage decide it. One more sentence in the section answers more items than it has any right to: the device is required to be installed in a readily accessible location.

The Texas amendment on 210.8(F)

This is the Texas-specific opportunity on the whole paper, and a national course will miss it.

Under 210.8(F), Exception No. 2 excuses listed heating, ventilation and air conditioning equipment from ground-fault protection, and in the national text that exception carries an expiration date printed inside it, 1 September 2026. Texas adopted the exception and left the expiration sentence out (16 TAC 73.100(b)).

So the national sunset lands elsewhere and the exception continues here. That matters twice: on the exam, because a Texas examination is referenced to the code Texas adopted, and on the job, because a nationally written update course will tell you the exception has gone when in this state it stands.

How the exam asks it

This topic crosses areas, which is the first thing to know. In our bank of 500 original Texas practice items, 210.8 turns up in items tagged to wiring and installation and to the administrative area covering Texas rules, and ground-fault devices turn up again inside the grounding and bonding area that holds 66 of the 500. Arc-fault items sit with wiring and installation, which is the heaviest area in the bank at 140 items.

Four forms carry most of them.

• A room name plus an occupancy type. Which subsection of 210.8 you are in, and dwelling or otherwise is the first fork.
• An ampere rating on the receptacle or the circuit. Whether you know the ceiling for that subsection, or that 210.8(A) carries none.
• A device comparison. A ground-fault circuit interrupter is offered as doing something about an overload, or an arc-fault device is offered as covering a ground fault.
• A date, an edition or the word amended. Whether you know the state-adopted version differs from the model code.

The device comparison deserves practice. A ground-fault circuit interrupter compares the current going out with the current coming back, so an overload passes it untouched and the breaker upstream handles that. An arc-fault device watches the shape of the current for the signature of an arc, so a series arc inside a cord leaks nothing to ground and a person touching an ungrounded conductor makes no arc at all. Where 210.8 and 210.12 both reach a dwelling receptacle, the answer is a device or devices providing both functions, which is why dual function devices exist.

Receptacle or outlet decides it

The dwelling and non-dwelling subsections are written about receptacles. 210.8(F) is written about outlets, and that one word changes what the subsection reaches.

An outlet is a point on the wiring system where current is taken to supply utilization equipment, whether or not anything plugs in. So a hardwired condensing unit outside a house sits on an outdoor outlet with no receptacle anywhere, which is exactly how 210.8(F) reaches equipment that 210.8(A) leaves alone. When an item describes hardwired equipment and you find yourself reading the receptacle lists, you are in the wrong subsection and the clock is running.

The opening sentence of 210.8(F) begins with the words for dwellings, so that subsection reaches residential work only. Outdoor and rooftop work on a commercial job is answered from 210.8(B), which is written about receptacles and carries a rooftop entry of its own.

Two changes arrived in the 2026 edition here. The ceiling in 210.8(F) rose from 50 amperes to 60, which NFPA panel 2 recorded in one line, that the branch circuit rating was increased because solutions are readily available and the hazard is the same. And 210.8(F) gained a list of locations underneath its opening sentence where it previously ran as a single sentence, so read the list.

Arc-fault starts with the circuit

Arc-fault protection lives at NEC 210.12, and the order in which you read the requirement decides whether you get the item.

The dwelling-unit requirement reaches 120 volt, nominal, single-phase branch circuits rated 15 and 20 amperes, and the 10 ampere rating as well, where they supply outlets or devices in the rooms and areas the subdivision lists. Read that sentence in the order it's written. The circuit rating comes first and the room comes second, and both have to hold. A 240 volt circuit sits outside it. A 30 ampere circuit sits outside it. A bedroom outlet on a 20 ampere, 120 volt circuit sits inside it.

That is the real difference from 210.8. A ground-fault item is usually settled by the location and the receptacle rating, and an arc-fault item is settled by the circuit rating first. Our own item on this hands you two 120 volt, 20 ampere circuits identical except for the room they serve, so the rating cannot separate them and location is all that's left. Candidates who go straight to the room list get the ones with an unusual circuit wrong.

The 2026 edition also moved the letters. 210.12(A) Means of Protection is a new subdivision holding the six ways the protection may be provided, and its arrival pushes the occupancy subdivisions one letter later. Find them by title in your own book.

Replacing a device pulls both rules forward

Swap a receptacle in a location that the current code requires to be ground-fault protected and the replacement gets that protection, even though the original never had it (NEC 406.4(D)).

The arc-fault rule works the same way one subpart later. Replace a receptacle on a branch circuit that requires arc-fault protection and the replacement is protected, by a listed outlet branch-circuit type device or from upstream.

This surprises people in the field and it makes a clean item, because the intuition says a like-for-like swap preserves whatever was there. The code treats the device coming out as the moment the present requirement attaches, and it waits for nothing else on the circuit to be disturbed. Where an equipment grounding conductor is absent in the box, the same subsection sets out what may be installed and how it's marked.

One related trap sits in Article 590. Receptacles installed for workers during construction need ground-fault protection for personnel even in rooms where the finished occupancy would require nothing, because temporary installations tighten some rules while the word temporary leads candidates to expect a relaxation.

Which edition answers your paper

One date decides which book your answers come from, and it's the date you sit that governs, with the day you booked having no part in it. Through 31 August 2026 the examinations are referenced to the 2023 edition, and from 1 September 2026 they are referenced to the 2026 edition. Texas adopts the 2026 National Electrical Code on the same day under 16 TAC 73.100.

Here two official documents disagree, so here is the conflict. The PSI Candidate Information Bulletin updated 9 July 2026 prints the edition change in capitals and ties it to the day you sit. As read on 24 August 2026, the reference material list inside that same bulletin still named the 2023 edition, and so did the TDLR examination page. The dated line is the one that governs your appointment.

Nothing else about the paper moves with the edition, so seventy percent still passes and the item counts hold. What moves is where things live in the book, which is why a tab set built for a 2023 copy costs you time on a paper scored on how fast you find the page. The dates are worked through from the licensing side on which code edition applies.

The same date reaches your renewal. The four hours of continuing education you owe each year point at the code as adopted under the Occupations Code, with no year named in the rule (16 TAC 73.25(b)(1)), so a course taught entirely on 2023 content after 1 September is teaching an edition the state has moved past. The whole requirement is set out on the four hours, as the rule is written.

What to do before test day

Four moves, and the second is the one nobody else will tell you to make.

1. Read the opening sentence of 210.8(A), (B), (D) and (F) in your own copy and write the ceiling for each on a card. Those four sentences answer more items than the location lists underneath them.
2. Read 16 TAC 73.100(b) yourself. It's one subsection and the difference from the national text is a single missing sentence, and it's the one fact on this topic that a national summary cannot give you.
3. Practice the device comparison until it's automatic, since ground-fault and arc-fault devices watch for different things and an item will offer you one doing the other's job.
4. Answer thirty mixed items under a clock at our free timed practice set, which prints the section behind every answer.

One field connection worth carrying. A ground-fault circuit interrupter that trips the moment its load runs, in a panel fed from another panel, is usually reporting a neutral to ground connection downstream of the device, and that diagnosis is worked through on the neutral to ground bond. The wider installation rules these items sit among are collected on wiring methods and installations.

Where you want the code text traced and the worked examples set out, that lives in the question set. This page is the Texas candidate's view of the same section: which sentence decides the item, and where the state-adopted text parts company with the national one.

Questions people ask

Which ampere ceiling applies to GFCI protection in a dwelling?

None applies. NEC 210.8(A) reaches receptacles rated 125 volt through 250 volt on single-phase branch circuits rated 150 volts or less to ground, and it sets no ampere ceiling at all, so a heavy receptacle in a listed location is covered the same as a 15 ampere one. The ceilings belong to the other subsections: 210.8(B) stops at 50 amperes single-phase and 100 amperes three-phase, 210.8(D) at 60 and 100, and 210.8(F) at 60. A dwelling item handing you a big ampere figure is testing exactly this.

What did Texas change about NEC 210.8(F)?

Texas adopted Exception No. 2, which excuses listed heating, ventilation and air conditioning equipment from ground-fault protection at an outdoor dwelling outlet, and left out the expiration sentence the national text prints inside it (16 TAC 73.100(b)). So the national sunset dated 1 September 2026 has no effect here and the exception continues in Texas. It matters on the exam, because a Texas examination is referenced to the code Texas adopted, and on the job, because a national course will tell you the exception has gone.

Does a hardwired outdoor condensing unit need GFCI protection?

At a dwelling, 210.8(F) reaches it, because that subsection is written about outdoor outlets and an outlet is a point where current is taken to supply utilization equipment whether or not anything plugs in. The dwelling and non-dwelling subsections above it are written about receptacles, so hunting through those lists for hardwired equipment wastes the minute the item was designed to cost you. Listed heating, ventilation and air conditioning equipment then meets Exception No. 2, which Texas adopted without the expiration sentence the national text carries.

What decides whether arc-fault protection is required?

The circuit rating first and the location second, and both have to hold. NEC 210.12 reaches 120 volt, nominal, single-phase branch circuits rated 15 and 20 amperes, and the 10 ampere rating as well, supplying outlets or devices in the rooms and areas the subdivision lists. A 240 volt circuit or a 30 ampere circuit sits outside the rule whatever room it serves. Given two circuits identical except for the room, the rating cannot separate them and the location list is what answers the item.

Does replacing a receptacle trigger the GFCI and AFCI rules?

Yes, and that catches people. NEC 406.4(D) attaches the current ground-fault requirement to a replacement receptacle in a location the present code covers, even where the original never had protection, and the arc-fault requirement attaches the same way one subpart later, satisfied by a listed outlet branch-circuit type device or from upstream. The device coming out is the moment the requirement lands, with nothing else on the circuit needing to be disturbed. Where the box holds no equipment grounding conductor, the same subsection sets out what may go in and how it's marked.

Which code edition will my Texas exam use?

The edition in force on the day you sit. Through 31 August 2026 the examinations are referenced to the 2023 edition and from 1 September 2026 to the 2026 edition, which is the day Texas adopts the 2026 code under 16 TAC 73.100. Two official documents disagreed as read on 24 August 2026: the PSI bulletin updated 9 July 2026 prints the change in capitals, while the reference material list inside that same bulletin and the TDLR examination page still named the 2023 edition. Confirm it on your own admission notice.