National Electrical Code (NEC): Which Edition Applies

What the NEC is

The NEC is published by the National Fire Protection Association as NFPA 70. It sets the rules for designing, installing and inspecting electrical systems in homes, commercial buildings and industrial plants. Grounding, bonding, load calculations, wiring methods and newer systems like solar PV, battery storage and EV charging all live in it.

NFPA revises the code every three years so it keeps pace with new equipment and methods. The current edition is 2026. Among its changes, it adds voltage-specific articles for systems over 1000V AC and 1500V DC, and folds the communications chapter (Chapter 8) into the general rules of Chapters 1 through 4 so the same requirements apply consistently.

Why a new edition does not apply everywhere at once

The NEC is a model code. It becomes law only when a government adopts it, usually by reference in a statute or rule. According to NECA, most states adopt it that way, many states with a statewide code let local jurisdictions add stricter rules, and some states leave electrical code adoption entirely to local government.

That means two job sites a few miles apart can be on different editions. Adoption also lags publication. Texas adopted the 2023 edition effective September 1, 2023, and the 2026 edition effective September 1, 2026. Washington adopted the 2026 edition but set its start date for December 31, 2026, so 2023 rules still govern there until then. Adopting bodies also amend the book. Texas cut the GFCI requirement for outlets serving outdoor HVAC equipment out of its 2026 adoption.

Why the edition matters for inspections and exams

Your inspector checks your work against the adopted edition plus local amendments, not the newest book on the shelf. Timing matters too. Texas guidance says that where no permit is required, the code in effect on the day you start installing materials applies. Where a permit is required, the code in effect when the permit was issued applies. Inside city limits, Texas electricians must also follow city permit rules and local amendments.

Exams can run on a different edition than the field. Before you sit a licensing exam, confirm the edition the exam is written to and bring that book. Continuing education also tracks code changes. Colorado requires 24 CE hours per three-year license period, with at least four in National Electrical Code changes.

How to read the book

The NEC is organized into chapters, then articles, then sections. A reference like 210.8(F) means Article 210, section 8, subdivision F. Learn the article numbers for the work you do most, then use the index to find the exact section. On the job, cite the section number when you talk to an inspector.

Read Article 90 early. Section 90.4 gives the authority having jurisdiction, usually your inspector or building department, the power to waive specific requirements or approve alternative methods that achieve equal safety. That is why the inspector's call and local amendments carry real weight. NFPA also offers read-only online access to its codes, which helps when you need to check an older or newer edition than the one you own.

Pay

Electricians, United States

$51,200–86,900

Electricians, Texas

$48,300–73,600

Electricians, Colorado

$50,600–81,200

Electricians, Washington

$69,000–125,800

USD a year, before tax. Ranges run from the 25th to the 75th percentile, based on U.S. Bureau of Labor Statistics OEWS May 2025 data moved to 2026 with a wage index; state figures are modeled. National median is about $65,400. Location, union status and license level move pay the most. Refer to the Electricians salary guide for figures from live adverts.

What you need

Know your adopting authorityFind out whether the state, county or city enforces the electrical code where you work. Some states have no statewide code and leave it to local government.
Match the edition and amendmentsWork to the adopted edition plus any state or local amendments, such as Texas removing the outdoor HVAC GFCI rule from its 2026 adoption.
Check the effective dateAn adopted edition only applies from its effective date. Washington's 2026 adoption starts December 31, 2026.
Track permit timingIn Texas, permitted work follows the code in effect when the permit was issued; unpermitted work follows the code in effect when installation began.
Use the exam's editionLicensing exams are written to a set edition that can trail the field code. Confirm it before you study.
Keep up with code changesMany states build NEC change training into continuing education. Colorado requires at least four hours on NEC changes each three-year period.

State by state

Texas	State law requires TDLR to adopt the revised NEC. The 2026 NEC took effect September 1, 2026, minus the GFCI requirement for certain outdoor outlets, and cities may adopt local amendments.
Washington	L&I reviews state electrical rules every three years. It adopted the 2026 NEC by reference, with state amendments in chapter 296-46B WAC, effective December 31, 2026, replacing the 2023 edition.
Colorado	The Colorado State Electrical Board held a rulemaking hearing on May 27, 2026 on revising Rule 1.5 to adopt the 2026 NEC. Licensees need 24 CE hours per three-year period, four on NEC changes.

How to get there

Apprenticeship year 1Learn the layoutGet familiar with chapters, articles and section numbering, starting with Article 90 and the articles for your daily work.
Before the examStudy the exam editionConfirm which NEC edition your licensing exam uses and study from that exact book.
Every new jobConfirm the local editionOn each job, identify who inspects it and which edition and amendments they enforce.
At permitCheck permit datesNote when the permit was issued or work started so you know which edition governs during a changeover.
Every 3 yearsTrain on the new cycleTake code-change classes when a new edition is published and again when your state adopts it.

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Questions people ask

Is the NEC a federal law?

No. The NEC is a model standard published by NFPA. It becomes enforceable only when a state or local government adopts it, usually by reference in its rules.

How often does the NEC change?

NFPA revises the NEC every three years. The newest edition is 2026, which followed the 2023 edition.

If my state adopts the new NEC, do I have to rewire old work?

Adoption applies to new work going forward. In Texas, for example, the governing edition is set by the permit issue date or, where no permit is needed, the date installation begins.

Can a city change NEC rules?

Often, yes. Texas law lets municipalities amend the state-adopted NEC, and many states with a statewide code let local jurisdictions adopt stricter requirements.

Which edition is on my licensing exam?

It depends on the testing authority, and the exam edition can trail the code used in the field. Confirm the edition before you study and bring that exact book to the exam.

What is the 2026 NEC's biggest change?

The 2026 edition adds voltage-specific articles for systems over 1000V AC and 1500V DC and integrates communications systems rules with Chapters 1 through 4. It also updates rules for energy storage, PV and EV power transfer systems.

What is the National Electrical Code and which edition applies to you?