NEC 90.12: adoption by state

What NEC 90.12 Actually Says

NEC 90.12 is new in the 2023 cycle. It states that only qualified persons shall install, modify, maintain, operate, or inspect electrical equipment and systems covered by the NEC. The language is short, but the impact on enforcement and liability is not.

"Qualified person" is defined in Article 100: one who has skills and knowledge related to the construction and operation of the electrical equipment and installations and has received safety training to identify and avoid the hazards involved. NEC 90.12 pulls that definition forward and makes it a threshold requirement for every task the Code covers.

This is not a new design rule. It is a scope rule. It answers the question: who is allowed to do the work?

Why the 2023 Cycle Added It

Before 90.12, the qualified-person concept was scattered across articles like 110.16 (arc-flash warning), 110.26 (working space), and the NFPA 70E training requirements. DIY installs, handyman rewires, and unlicensed "helpers" running circuits were a persistent source of fires and shock incidents. The CMP wanted a single, enforceable hook at the front of the book.

The section also aligns NEC language with OSHA 1910.332 and NFPA 70E, which already restricted energized and exposed work to qualified persons. Inspectors now have a Code citation, not just an OSHA reference, to reject work done by unqualified labor.

Adoption by State: the Current Map

The NEC is not federal law. Each state, and sometimes each municipality, adopts a specific edition. As of early 2026, adoption of the 2023 NEC, and therefore 90.12, varies widely.

• 2023 NEC adopted statewide: Colorado, Idaho, Iowa, Massachusetts, Nebraska, New Hampshire, South Carolina, Texas, Utah, Vermont, Virginia, Washington, Wyoming.
• 2023 NEC adopted with amendments: Connecticut, Delaware, Maryland, Minnesota, Montana, Nevada, Rhode Island.
• Still on 2020 NEC: Alabama, Arkansas, Florida, Georgia, Illinois (home rule), Kentucky, Louisiana, Michigan, New Jersey, New Mexico, North Carolina, North Dakota, Ohio, Oklahoma, Oregon, Pennsylvania (home rule), Tennessee, West Virginia, Wisconsin.
• Still on 2017 NEC or earlier: Arizona (no state adoption, local only), California (2022 CEC based on 2020), Hawaii, Indiana, Kansas, Maine, Mississippi, Missouri, South Dakota.
• No state adoption, local AHJ rules: Alaska, Illinois, Mississippi, Pennsylvania.

Check with your state electrical board before quoting a job. Several states have adoption scheduled but not effective: New York moves to 2023 in 2026, Georgia targets late 2026.

Field tip: if you work across state lines, keep a printed adoption chart in the truck. A 2023 install in Texas is a Code violation in Louisiana until Louisiana catches up, and the AHJ signs the permit, not the NFPA.

What 90.12 Means on the Job

If your state has adopted the 2023 NEC, 90.12 changes three things in practice.

1. Apprentice supervision. Apprentices are not qualified persons under Article 100 until they complete the required training. They can still do the work under the direct supervision of a journeyman or master, but the licensed electrician owns the install.
2. Homeowner permits. Many jurisdictions allow homeowner permits on single-family dwellings. 90.12 does not override state licensing statutes, but inspectors in adopting states are starting to fail homeowner work that shows a clear lack of qualification, and they now cite 90.12 to do it.
3. Handyman and GC side-work. A general contractor pulling a receptacle circuit during a remodel is now a clean 90.12 violation in adopting states. Document who did the work on your permit.

Energized work, covered separately under 110.26 and NFPA 70E, was already restricted. 90.12 closes the loophole on de-energized installs done by unqualified hands.

Enforcement and Documentation

Inspectors cannot watch every install. Enforcement is typically triggered by a failed inspection, a fire investigation, or a complaint. When it does trigger, 90.12 gives the AHJ a direct citation for rejecting work and a paper trail for license board referrals.

Protect yourself with documentation. Sign-offs, apprentice hour logs, and permit applications that clearly identify the qualified person of record matter more under 2023 than they did under 2020.

• List the licensed electrician on every permit, not just the company name.
• Keep apprentice-to-journeyman ratios within state law, not just company policy.
• If a GC asks you to "finish up" work someone else started, inspect it first and take over the permit, or walk away.

Field tip: if an inspector red-tags work citing 90.12, do not argue qualification on site. Pull the permit record, confirm who signed, and resolve it in the office. Arguing in the field almost always escalates.

Quick Reference

90.12 is short, but it sits at the top of the Code for a reason. Know your state's adoption status, know who the qualified person of record is on every job, and keep your documentation clean. The rest of the NEC is technical; 90.12 is about who is allowed to open the panel.

Related sections worth rereading: Article 100 (definition of qualified person), 110.16 (arc-flash labeling), 110.26 (working space and access), and NFPA 70E 110.2 (training requirements). Together, they define the envelope 90.12 now enforces.