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Which NEC Edition Does Your State Test On?
The single most expensive study mistake: drilling the wrong Code edition. Your exam is based on whichever NEC your state has adopted — and states move on different schedules. Find yours below, then study that book.
⚠️ Read this first: this table reflects the NFPA's official enforcement map dated August 3, 2026, with two updates — Texas moved to the 2026 NEC on September 1, 2026 (per the TDLR bulletin), and Wisconsin's 2023 adoption took effect the same day. Adoption changes constantly: verify against your state board or candidate bulletin before buying a Code book. "w/ amendments" means the state modifies the NEC — your exam follows the amended version.
| State | NEC edition in effect | Notes |
|---|---|---|
| Alabama | 2020 | Effective 7/1/2022 |
| Alaska | 2020 | Effective 4/16/2020 |
| Arizona | Local adoption | No statewide code — check your city/county |
| Arkansas | 2020 | With amendments, eff. 8/1/2022; 2026 update underway |
| California | 2023 | With CA amendments, eff. 1/1/2026 |
| Colorado | 2026 | Effective 8/1/2026 |
| Connecticut | 2020 | With CT amendments, eff. 10/1/2022; 2023 update underway |
| Delaware | 2023 | Effective 1/1/2026 |
| Florida | 2020 | Effective 12/31/2023; 2023 update underway |
| Georgia | 2023 | Effective 1/1/2025 |
| Hawaii | 2020 | Effective 3/14/2023 |
| Idaho | 2023 | With ID amendments, eff. 7/1/2023 |
| Illinois | 2008 | Commercial occupancies outside local jurisdictions; otherwise local adoption |
| Indiana | 2008 / 2017 | 2008 commercial; 2017 for one- and two-family dwellings; 2023 update underway |
| Iowa | 2023 | With IA amendments, eff. 7/1/2025; 2026 update underway |
| Kansas | 2008 | State Fire Marshal; otherwise local adoption |
| Kentucky | 2023 | Effective 1/1/2025; 2026 update underway |
| Louisiana | 2020 | Effective 1/1/2023 |
| Maine | 2026 | With ME amendments, eff. 7/1/2026 |
| Maryland | 2020 | With MD amendments, eff. 7/1/2025; 2023 update underway |
| Massachusetts | 2026 | With MA amendments, eff. 4/24/2026 |
| Michigan | 2023 / 2014 | 2023 commercial (eff. 3/12/2024); 2014 for one- and two-family dwellings |
| Minnesota | 2026 | Effective 8/17/2026 |
| Mississippi | Local adoption | Incorporation by reference only — check locally |
| Missouri | Local adoption | Incorporation by reference only — check locally |
| Montana | 2020 | With MT amendments, eff. 6/10/2022; 2023 projected 9/2026 |
| Nebraska | 2023 | Effective 8/1/2024; 2026 update underway |
| Nevada | 2017 | Effective 7/1/2018 (State Public Works Division) |
| New Hampshire | 2023 | With NH amendments, eff. 7/1/2025 |
| New Jersey | 2020 | With NJ amendments, eff. 9/6/2022 |
| New Mexico | 2020 | Effective 3/28/2023 |
| New York | 2023 | Effective 12/31/2025 (NYC on 2020 with NYC amendments, eff. 12/21/2025) |
| North Carolina | 2020 | With NC amendments, eff. 11/1/2021 (non-residential) |
| North Dakota | 2026 | Effective 7/1/2026 |
| Ohio | 2023 | Commercial eff. 3/1/2024; residential eff. 4/15/2024 with amendments |
| Oklahoma | 2023 | Effective 9/14/2024 |
| Oregon | 2023 | With OR amendments, eff. 10/1/2023; 2026 projected 10/1/2026 |
| Pennsylvania | 2020 | Effective 1/1/2026 |
| Rhode Island | 2023 | Effective 12/1/2025 |
| South Carolina | 2020 | With SC amendments, eff. 1/1/2023; 2023 adopted, effective 1/1/2027 |
| South Dakota | 2023 | With SD amendments, eff. 11/12/2024 |
| Tennessee | 2017 | With TN amendments, eff. 10/1/2018 |
| Texas | 2026 | Effective 9/1/2026 per TDLR — exams now reference the 2026 NEC |
| Utah | 2023 | Effective 1/1/2025 |
| Vermont | 2020 | Effective 1/1/2023; 2023 update underway |
| Virginia | 2020 | Effective 1/18/2024; 2023 update underway |
| Washington | 2023 | Effective 4/1/2024; 2026 projected 12/31/2026 |
| West Virginia | 2020 | With WV amendments, eff. 8/1/2022 |
| Wisconsin | 2023 | Adoption complete, effective 9/1/2026 |
| Wyoming | 2026 | Effective 7/1/2026 |
Sources: NFPA "Learn where the NEC is enforced" (table dated August 3, 2026); Texas per the PSI/TDLR Candidate Information Bulletin (updated 9/15/2026); Wisconsin per EC&M, September 2026. Chicago enforces the 2017 NEC with Chicago amendments (eff. 3/1/2018).
Found Your Edition?
Now study the right book. Sparky's drills are codebook-first — every question a lookup rep in your edition:
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- Free NEC formula sheet — every exam calculation on one page.
- NEC 2023 vs. 2020 — the changes most likely to be tested.