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Which NEC edition applies to your job?

The edition that binds you is the one your permit-issuing authority enforces, as amended, on the day your permit issues. This page gives you the call to make and the three questions to ask.

No map because a map answers the wrong question We attempted to verify a state-by-state adoption record on 5 September 2026 and could not retrieve one from a primary source, so we publish none and publish the failed attempts instead.

The short answer. Call the office that will issue your permit — usually a city or county building department — and ask three things: which edition of the NEC do you enforce, is there a published local amendment document, and which edition will my permit be issued under if I apply next month.

Write down the answers with the date and the name. That is the enforceable answer, and nothing on the internet can substitute for it.

Why not a map. Three things stack. A state adopts an edition. A city or county may adopt a different one, and where it does, the local adoption is what your inspector enforces.

And whichever edition was adopted, the jurisdiction may amend it section by section — so two places can both be "on the 2023 NEC" and enforce materially different rules. A national map shows the first and is silent on the two that override it.

And the date matters. The governing edition is generally the one in force when the permit is issued — not when you started designing. A project spanning a changeover can be designed under one edition and permitted under another: a redraw if you catch it early, a rewire if you do not.

What we could not verify. We tried three NFPA sources on 5 September 2026 and retrieved no state-by-state adoption record. No state-by-state NEC adoption record was verified from a primary source, so none is published here.

This matches the standing instruction for this topic: a table sourced from blogs must not ship. The attempts are listed on this page in full. Live electrical work is not a do-it-yourself subject here. Nothing on this site instructs a reader to open, probe or modify energized equipment.

What to ask, for your specific job

No state input, because we hold no verified adoption data and a state answer would not bind you anyway. This produces the call to make and the questions to ask. Nothing is emailed.

— The honest answer
— Who to ask
— Exactly what to ask
— What your timing changes
— What we do not know

What this assumed —

A questioning aid for a conversation with a licensed electrician and your AHJ. No adoption data, no code text, no specification, and not permission to perform work. HyreElectrical does not perform, design, inspect or permit electrical work.

Why we will not show you a map

Not because we could not find one. Because a map answers a slightly different question than the one that decides your job.

Three things stack, and only the last one binds you. A state may adopt an edition of NFPA 70.

A city or county may adopt a different one, and where it does, the local adoption is what your inspector enforces.

And whichever edition was adopted, the adopting jurisdiction may amend it section by section — so "we are on the 2023 NEC" does not, by itself, tell you the rule that applies to your kitchen.

A national map can show you the first of those three and is silent on the two that override it.

A worked example of why the edition decides it. Whole-home surge protection entered the model code as section 230.67 in the 2020 edition; the 2017 edition has no such section.

So the identical panel replacement is a code requirement in a jurisdiction on the 2020 cycle or later and an optional upgrade in one still on 2017.

We walk that through on whole-home surge protection, which carries no adoption map either, for the reasons on this page.

Then there is the date. The edition that governs a job is generally the one in force when the permit is issued — not the edition in force when you started designing, and not the newest edition NFPA has published.

A project that spans an adoption changeover can be designed under one edition and permitted under another, which is a redraw if you catch it early and a rewire if you do not.

This site already says so everywhere; this page makes it actionable. HyreElectrical’s standing position appears as a caveat on every code figure we publish:

"Adoption and amendment of the National Electrical Code is local. A state or city may be on an older edition, may amend it, and may add rules of its own. Confirm the adopted edition and the amendments with the authority having jurisdiction before relying on any code figure here."

That sentence is correct and it is also, on its own, not very useful. The purpose of this page is to turn it into a procedure — who to call, what to ask, and what to do with the answer.

What we could not verify, stated plainly. We attempted to retrieve a state-by-state adoption record on 5 September 2026 and failed. No state-by-state NEC adoption record was verified from a primary source, so none is published here.

This matches the standing instruction for this topic: a table sourced from blogs must not ship. The attempts are listed below in full, because a claim that something could not be verified is only worth anything with the attempts attached.

HyreElectrical analysis. There is a reason the map format is so common on this topic despite being the wrong shape for it: a map is easy to publish, easy to syndicate, and looks authoritative.

The correct answer is a phone call whose result differs by address, which is nobody’s idea of a good landing page.

But a reader who trusts a map and gets contradicted by an inspector has been actively misled, and the cost of that lands at rough-in inspection rather than on the website that published it.

What we tried, and what happened

Published in full. This is the evidence for the claim that no table appears on this page.

Source attemptedURLResult on 5 September 2026
nfpa.org — NEC enforcement mapshttps://www.nfpa.org/education-and-research/electrical/nec-enforcement-mapsPage served, but the adoption data renders client-side. No state-by-state text could be retrieved.
nfpa.org — code adoption by statehttps://www.nfpa.org/for-professionals/codes-and-standards/code-adoption-by-stateHTTP 404.
NFPA blog — "NEC now used in all 50 states"https://nfpa92.nfpa.org/Host did not resolve by DNS.

No state-by-state NEC adoption record was verified from a primary source, so none is published here. This matches the standing instruction for this topic: a table sourced from blogs must not ship. If you find a primary, retrievable, dated state adoption record, it belongs here and we would rather publish it than this table.

The procedure that actually answers the question

One call, three questions, written down. It is genuinely this short.

  1. 1
    Identify who issues your permit

    Usually a city or county building department; in some places a state or regional office. This is the authority having jurisdiction (AHJ), the only body whose answer binds your project. If you do not know who it is, your licensed electrician does.

  2. 2
    Ask which edition is enforced, and whether there are amendments

    Both halves matter. The edition alone is half an answer: many jurisdictions publish a local amendment document that modifies the adopted edition section by section. Ask whether one exists and where to read it.

  3. 3
    Ask what the edition changes for your specific scope

    This is where the answer becomes money rather than trivia. The calculator above names, for each kind of job, the topics whose treatment has moved between recent editions, so you can ask about the two or three that affect your quote.

  4. 4
    Ask which edition your permit will be issued under

    Especially if an adoption changeover is near. The answer determines what you should be designing to right now, and it is the question people most often fail to ask.

  5. 5
    Write the answers down, with the date and the name

    A dated note of who told you what is worth a great deal if a plan-checker later takes a different view. It is also what lets your electrician quote against a known target rather than a guess.

How people get this wrong

Ranked by what each one costs when it surfaces.

  • Designing to the newest published edition

    The newest edition NFPA has published is frequently not the one your jurisdiction enforces. Designing to it can add scope you do not need — and, worse, can leave you non-compliant with an older adopted edition’s differently-worded requirement.

  • Trusting a state map when the city adopted something else

    Where a local adoption differs from the state’s, the local one is the one standing in your kitchen. This is the specific failure mode the map format produces.

  • Ignoring local amendments entirely

    An adopted edition is routinely modified. Two jurisdictions can both be "on the 2023 NEC" and enforce materially different rules.

  • Assuming existing work is grandfathered when you touch it

    Whether a remodel pulls existing circuits into a current requirement is decided by the AHJ, and it is exactly the area where editions differ. Ask before you open the wall, not after.

  • Asking the edition but not the amendments

    Half an answer, and the half that is easier to get. Always ask whether an amendment document exists and where to read it.

  • Letting a permit lapse near a changeover

    A renewal can land under a newer edition. If your permit is close to expiry and an adoption is due, ask what happens on renewal.

  • Taking the answer from a contractor rather than the AHJ

    Good electricians usually know. But the person who signs off your inspection is the one whose answer is authoritative, and a two-minute call gets it from the source.

What this page does not contain, and will not

The absences are deliberate and each has a reason.

No state adoption table. We could not verify one from a primary source on 5 September 2026. Reprinting one from secondary sources would produce exactly the artefact this page argues against: something authoritative-looking that your inspector may contradict.

No NEC text. NFPA 70 is copyrighted and we did not retrieve it for this page. The job-specific notes in the tool name topics to ask about and are labeled HyreElectrical analysis. They are not code requirements, they are not quotations, and they should not be handed to anyone as a specification.

No edition-by-edition change list. For the same reason. Describing what changed between editions accurately requires reading both, and we have read neither for this page.

No instruction to perform work. Live electrical work is not a do-it-yourself subject here. Nothing on this site instructs a reader to open, probe or modify energized equipment. HyreElectrical does not perform, supervise or warrant electrical work, does not open panels, and does not pull permits.

And no substitute for the AHJ. Everything here is a way of asking a better question. The answer belongs to the office that will issue your permit and inspect the result.

How this calculator works

No arithmetic. This is a rule set, published in full, and there is no hidden data behind it — in particular there is no state adoption table, because we have none.

governing edition = whatever YOUR permit-issuing authority enforces,
                    AS AMENDED by that authority,
                    ON THE DATE YOUR PERMIT IS ISSUED

three things stack, and only the combination binds you:
    1. state adoption          (what a national map shows)
    2. local adoption          (may differ; where it does, it governs)
    3. local amendments        (section-by-section changes to either)

the tool selects:
    where  <- from whether you know your permitting authority
    ask    <- from your job type: the topics that differ by edition
    timing <- from whether a permit has issued

NOT USED: your state.  We hold no verified adoption record and a
          state answer would not bind you regardless.

The job type does not change the answer — it changes the question, which is the useful part. Asking a permit clerk "which NEC edition do you enforce?" gets you a number.

Asking "which edition, are there amendments, and for an EV charger circuit which load-calculation method do you accept and is energy management permitted in place of a service upgrade?" gets you the two or three facts that actually move your quote.

What each input means

Inputs on this tool, in the order they appear on the form.
InputWhat it is actually asking
Kind of work Selects which topics to ask about. These are areas whose treatment has moved between recent editions — HyreElectrical analysis, not code requirements. WHERE YOU FIND IT: your own project scope, or the description on your electrician’s quote.
Who issues your permit Determines where to start. If you already know it is a city or county department, that is the binding authority and you can go straight there. If you only know a state adoption, the tool tells you why that is a starting point rather than an answer. WHERE YOU FIND IT: your electrician knows; otherwise search your address plus "building permit".
Where you are in the project Changes what your timing exposes you to. Before design, confirming the edition is nearly free. Mid-design it is a redraw. After a permit issues you are generally protected by the edition in force at issue — with expiry and renewal as the exception worth asking about.
Whether a permit has issued The clearest marker of whether an edition changeover can still affect you. If you are unsure, your electrician or the permit counter can confirm in a minute.

Worked examples

Including one where the naive answer misleads, which is the example most calculators leave out.

EV charger, city permit, still designing

The tool confirms the city building department is the binding authority and tells you to call its building or electrical division.

The questions become specific: which edition, is there a published amendment document, and for an EV charger circuit — which load-calculation method the inspector accepts, whether energy management is permitted in place of a service upgrade, and what GFCI protection is required.

The timing line makes the case for calling now: a design assumption that turns out to be a superseded edition is a redraw, whereas the same discovery after rough-in is a rewire.

Panel upgrade, permitting authority unknown

The tool starts one step earlier — find out who issues your building permit, and if you do not know, ask your licensed electrician, because they pull permits in your jurisdiction and will know immediately.

The panel-specific questions cover outdoor emergency disconnect, whether a surge-protective device must be installed with the panel, and the working clearances the inspector will measure. Those are the three things most likely to add scope to a panel job after the quote is signed.

Kitchen remodel, you only know the state edition

The tool declines to treat that as the answer: a statewide adoption is the starting point, not the finish.

It tells you to confirm with the office that will actually issue the permit whether it enforces the state edition unmodified or has adopted a different edition or its own amendments — and notes that where they differ, the local office is the one standing in your kitchen.

The remodel questions cover GFCI coverage, AFCI on the circuits you are touching, and whether replacing a receptacle triggers a requirement that did not exist when it was installed.

Permit already issued

The timing output changes entirely: a permit already issued is normally governed by the edition in force when it was issued, which protects you from a mid-project change.

But it flags the exception people miss — permits expire, and a renewal can land under a newer edition, so if yours is close to expiry it is worth asking what happens on renewal before letting it lapse.

What changes the result

What changes the answer, ranked.

1. Which office issues your permit. Not a detail — it is the entire question. Everything else is downstream of identifying the right authority, and a correct answer from the wrong office is worthless.

2. Whether that jurisdiction has amendments. The most commonly skipped half of the question, and the one that makes two jurisdictions "on the same edition" enforce different rules.

3. Your permit issue date. Decides which edition attaches, and is the reason to ask before the drawings are final rather than after.

4. Your scope. Changes which topics are worth asking about. It does not change the governing edition, only which parts of it you care about.

What is deliberately absent, and why.

Your state. There is no state input in this tool at all. We hold no verified adoption record, and even a correct state answer would not bind a project in a city that adopted something else. Adding the field would imply a precision we do not have.

Any adoption year, for anywhere. Not one appears on this page. The verification attempts are published instead.

Any NEC text. NFPA 70 is copyrighted and was not retrieved. Topics are named; requirements are not stated.

Any edition-by-edition change list. Writing one accurately means reading both editions, and we read neither for this page.

Local considerations

The adopted NEC edition is the most local question on the site. HyreElectrical’s standing position, carried as a caveat on every code figure we publish, is:

"Adoption and amendment of the National Electrical Code is local. A state or city may be on an older edition, may amend it, and may add rules of its own. Confirm the adopted edition and the amendments with the authority having jurisdiction before relying on any code figure here."

This page exists because that caveat is correct and, on its own, not actionable. The procedure above is what it looks like when turned into something you can do in five minutes.

The practical shape of it. State adoption tells you what is likely. Local adoption tells you what is enforced. Local amendments tell you what is actually required. And your permit issue date tells you which of those applies to you specifically. Only the last combination is the answer, and only your AHJ holds it.

One thing worth knowing about the code itself. NFPA 70 is a model standard published by a private organization.

It carries legal force only where a jurisdiction adopts it, which is why adoption, amendment and effective dates are the whole subject here.

What binds you is your jurisdiction’s adopting ordinance including its amendments — not the model document as published, and not the newest edition on NFPA’s website.

When not to use this

Do not use this as a code reference. No NEC text is quoted here and no requirement is stated. It tells you what to ask, not what the rule is.

Do not use it as a substitute for the AHJ. Every output points at a phone call because the phone call is the answer. Nothing on this page is authoritative for your address.

Do not hand the job-specific notes to a contractor as a specification. They are HyreElectrical analysis naming topics to ask about. A specification is produced by someone who has seen the building and signs for it.

Do not assume any adoption year you read anywhere, including here. We publish none precisely because we could not verify any.

And do not treat any of this as a basis for doing the work. Live electrical work is not a do-it-yourself subject here.

Nothing on this site instructs a reader to open, probe or modify energized equipment. HyreElectrical does not perform, supervise or warrant electrical work, does not open panels, and does not pull permits.

Nothing on this site is a stamped load calculation, a design, or a permit document.

A load calculation that an inspector accepts is produced by someone who has seen the building and signs for it.

Related on this site

Questions this calculator answers

Which edition of the NEC does my state use?
We deliberately do not answer that. We could not retrieve a verifiable state-by-state adoption record from NFPA on 5 September 2026, and a state answer is not the answer anyway: your city or county may enforce a different edition, and the local one governs. Ask the office that will issue your permit.
How do I find out which NEC edition applies to me?
Call whoever issues your building permit and ask two things: which NEC edition they enforce, and whether there is a published local amendment document. The edition alone is half an answer, because jurisdictions amend the code section by section. If you do not know who issues permits for your address, your electrician will.
Why do two cities in the same state enforce different rules?
Because adoption and amendment are often local. A city or county can adopt a different edition from the state and amend whichever it adopts, so "we are on the 2023 NEC" does not tell you the rule for your kitchen. That is why a state map is the wrong shape for this question.
Which edition governs my project — the one when I designed it or when I build it?
Generally the edition in force when the permit is issued, which is why to ask before the drawings are final. A project spanning an adoption changeover can be designed under one edition and permitted under another, and finding that out at rough-in inspection costs far more than at design.
My permit is already issued. Am I safe from a code change?
Normally yes: an issued permit is usually governed by the edition in force when it was issued. The exception is expiry, because a renewed permit can fall under a newer edition. If your permit is close to expiring and a changeover is near, ask what happens on renewal before it lapses.
Does a remodel bring my existing wiring up to the current code?
Sometimes, and it is decided by your AHJ rather than by any general rule. Whether touching a circuit pulls existing work into a current requirement is exactly the area where editions differ and where local amendments are common. Ask before the wall is open — the answer changes the scope and therefore the quote.
Can I just ask my electrician instead of the building department?
Ask both. An electrician who pulls permits in your jurisdiction usually knows and will save you the call, but the inspector's office gives the authoritative answer in a two-minute call. Where the two disagree, the authority having jurisdiction wins.
Why does this page not quote the code?
NFPA 70 is copyrighted and we did not retrieve it for this page. The job notes in the tool name topics whose treatment has moved between recent editions, so you can ask about them. They are labeled as HyreElectrical analysis, not quotations, and must not be used as a specification.
What should I ask about for an EV charger specifically?
Which load-calculation method the inspector accepts, whether energy management is allowed instead of a service upgrade, and what GFCI protection the receptacle or hardwired circuit needs. EV charging moves fastest between code editions, and the edition can decide whether you need a service upgrade at all.
What about a panel replacement?
Ask whether an outdoor emergency disconnect is required at your service, whether a surge-protective device must go in with the panel, and what working clearances the inspector will measure. Service equipment has been heavily revised in recent editions, and these items add scope after a quote is signed.
Is the NEC actually law?
Not by itself. NFPA 70 is a model standard from a private organization, with legal force only where a jurisdiction adopts it. What binds you is your jurisdiction's adopting ordinance, with any amendments, not the model document as published.
Can I do the work myself once I know the edition?
This page does not answer that or encourage it. Live electrical work is not a do-it-yourself subject here, and HyreElectrical does not perform, supervise or warrant electrical work. Knowing the edition helps you check a licensed electrician’s proposal; it is not a qualification to do the work.

Sources and methodology

Figures dated 5 September 2026. Last reviewed .

  • NEC enforcement maps (National Fire Protection Association, retrieved 2026-09-05. ATTEMPTED AND NOT USABLE. The page served, but its adoption data renders client-side and no state-by-state text could be retrieved. Listed because this page’s central claim is that we could not verify an adoption record, and that claim requires its attempts to be shown. NFPA is the publisher of NFPA 70 and remains the right place for a reader to look.)
  • Code adoption by state (National Fire Protection Association, retrieved 2026-09-05. ATTEMPTED. Returned HTTP 404 on this date.)
  • NFPA 70, National Electrical Code — product page (National Fire Protection Association, retrieved 2026-09-05. Cited to identify the document under discussion and its publisher. NFPA 70 is copyrighted; no code text is quoted anywhere on this page, and none was retrieved for it.)
  • HyreElectrical standing position on code adoption (HyreElectrical editorial policy, retrieved 2026-09-05. The caveat carried on every code figure this site publishes — that adoption and amendment are local and must be confirmed with the authority having jurisdiction. This page is that caveat turned into a procedure.)

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