Checked against primary sources 2026-09-04

How Often Is the NEC Updated? The Three Year Cycle

The book changes on a three year rhythm and your state does not. Those are two different clocks, and nearly every argument about which edition applies is somebody reading one of them as the other.

Quiz yourself: did this section move?

The three year rhythm

The National Electrical Code comes out every three years. The three editions in circulation right now are the 2020, the 2023 and the 2026, and the amendment pending against the outdoor ground-fault exception is written against all three at once, which tells you how long an edition stays in use somewhere.

What the three year rhythm does not describe is when a rule reaches you. NFPA approved the 2026 edition on September 9, 2025. Texas adopts it effective September 1, 2026 under 16 TAC 73.100, about a year later, and the state examinations change edition on the same day.

So there are two clocks. The publishing clock runs on three years, and the adoption clock runs on whatever your state does. Most arguments about which edition applies are two people reading different clocks.

How NFPA gets from one edition to the next

NFPA publishes a revision cycle schedule for each edition of NFPA 70, and every stage on it has a name and a closing date. In order:

• Public input. Anybody can propose a change, and the stage ends on a published closing date.
• First draft. The code-making panels meet on the public input, ballot what they did, and NFPA posts a first draft report.
• Public comment. The first draft report goes back out, and comments on it close on a date of their own.
• Second draft. The panels meet again on the comments, ballot again, and NFPA posts a second draft report.
• Notices of intent to make a motion. Anyone who wants to challenge a panel action files one by a closing date, and the certified amending motions that come out of that are posted.
• The technical meeting. Those certified motions are debated and voted at the association technical meeting.
• Appeals, then issuance. Appeals close, and the Standards Council issues the standard on a published date.

The schedule NFPA published for one NEC cycle gives the shape of it in dates. Public input closed on September 7, 2017. The public comment stage closed on August 30, 2018. The second draft report went out in April 2019, the technical meeting sat on June 20, 2019, and the Standards Council issuance date was August 7, 2019. Just under two years from the door closing on proposals to a standard being issued.

Two things follow. A change you read about in a draft report is not code yet, because the stages after it can still take it back out. And by the time an edition is printed, work on the next one has already started, which is how a change list can be accurate and out of date at the same time.

Why a state runs behind

Publishing an edition does not enforce it anywhere. A state adopts, by its own instrument and on its own date, and until it does, the older edition is the one you are held to.

In Texas the instrument is a rule. 16 TAC 73.100 adopts the 2026 National Electrical Code as approved by NFPA on September 9, 2025, effective September 1, 2026. The 2023 edition took effect here on September 1, 2023 on the same pattern, so Texas has run about a year behind the printing on each of the last two editions. There is a page here on what the rule does and how the vote went.

The state does not have to take all of it, either. Subsection (b) of that same rule carries one Texas amendment, and it changes what an outdoor ground-fault exception does here.

Then local amendments stack on top of the state adoption, and where a city has amended a section its version governs inside that jurisdiction. Which is why the useful answer to which edition applies is a question about your permit and your jurisdiction rather than about the newest book on the shelf.

What a TIA is, and why it does not wait

NFPA can change a published edition without waiting three years for the next one, and a tentative interim amendment is the mechanism. It is tentative because it has not been through the whole process above, and interim because it is effective only between editions.

The front matter of the 2026 edition names eight sections that tentative interim amendments and an errata reached: 240.86(C), 430.132, 500.30(A), 501.15(B)(2), 505.30(A), 506.30(A), 680.21(C) and 690.12(C). It says those have been issued and incorporated into the Code, so a new book already carries them and nothing in the margins points them out. The full account is here.

So the three year rhythm describes editions. It does not describe the code, which can change inside a cycle, and did.

Questions people ask

How often is the NEC updated?

Every three years. The editions in circulation now are the 2020, the 2023 and the 2026. That is the rhythm the book is published on, and it is not the rhythm any particular state enforces on.

What is the latest edition?

The 2026 edition. NFPA approved it on September 9, 2025, and Texas adopts it effective September 1, 2026 under 16 TAC 73.100. Until August 31, 2026 the edition adopted in Texas is the 2023.

When is the next NEC edition?

We are not going to give you a date we have not read. On the three year rhythm the next edition follows the 2026 one three years on, and NFPA's own cycle schedule shows about two years running between the public input closing date and issuance, so the work on it starts long before the book exists.

Does every state use the newest edition?

No. Publication and adoption are separate acts, and a state adopts on its own date by its own instrument. Texas has run about a year behind the printing on each of the last two editions, and cities inside it can amend the adopted edition further.

Is the 2026 NEC in effect in Texas?

It takes effect on September 1, 2026 under 16 TAC 73.100, and the state examinations change edition the same day. Which edition governs a particular installation is a separate question that follows the permit, or the day work started where no permit was needed.

What is an NEC TIA?

A tentative interim amendment: NFPA changing a published edition without waiting for the next one. The front matter of the 2026 edition names eight sections that amendments and an errata reached, and says they have been issued and incorporated into the Code. So a book bought new already carries them, and the revision marks in the margins do not point them out.

What this page cites

• NFPA 70 revision cycle schedule The stage names and the dates used above, from NFPA's own published schedule for an NEC revision cycle: public input closing September 7, 2017, public comment closing August 30, 2018, second draft report posted April 2019, notice of intent to make a motion closing April 26, 2019, certified amending motions posted May 17, 2019, association technical meeting June 20, 2019, appeal closing July 10, 2019, Standards Council issuance August 7, 2019. Read September 4, 2026. source
• 16 TAC 73.100 Texas adoption of the 2026 National Electrical Code as approved by NFPA on September 9, 2025, effective September 1, 2026, with the one Texas amendment at subsection (b). Stated with its own sources on this site's page for the cutover. source
• Texas adoption of the 2023 edition Effective September 1, 2023, which is the pattern the 2026 adoption repeats. source
• NFPA 70, 2026 edition front matter Names eight impacted sections, 240.86(C), 430.132, 500.30(A), 501.15(B)(2), 505.30(A), 506.30(A), 680.21(C) and 690.12(C), and states that they have been issued and incorporated into the Code. The sheets themselves are listed on this site's amendments page. source
• NFPA 70 TIA 1924 The pending proposal written against the 2020, 2023 and 2026 editions at once, which is where the three editions in circulation come from. source