As of March 1, 2025, the 2023 NEC is in effect in 17 states; the 2020 NEC is in effect in 21 states; the 2017 NEC is in effect in six states; and the 2008 NEC is in effect in two states.
Note: The 2023 edition of the NEC was issued by the NFPA Standards Council on August 12, 2022. The effective date was September 1, 2022, when it officially became available for federal, state, county, and municipal governmental entities to update their electrical installation regulations.
The following table shows the edition of the NEC in effect in those states having a statewide regulation that impacts construction, trade licensing, or both. Follow the link to the board or agency responsible for updating the NEC.
| State | Current Edition Of The NEC In Effect | 2020 Or 2023 NEC UPDATE Status | Other Editions Of NEC Update Status |
|---|---|---|---|
| Alabama | 2020 (7/1/2022), Alabama Division of Construction Management | ||
| Alaska | 2020 (4/16/2020) | ||
| Arizona | Local adoption only | ||
| Arkansas | 2020 with AR amendments (8/1/2022) | ||
| California | 2020 with CA amendments (1/1/2023) | 2023 update process underway (Projected 1/1/2026) | |
| Colorado | 2023 (8/1/2023) | ||
| Connecticut | 2020 with CT amendments (10/1/2022) | 2023 update process underway (Effective date not established) | |
| Delaware | 2020 (9/1/2021) | ||
| Florida | 2020 (12/31/2023) | ||
| Georgia | 2023 (1/1/2025) | ||
| Hawaii | 2020 (3/14/2023) | ||
| Idaho | 2023 (7/1/2023) with ID amendments (temporary rules permit use of 2017 NEC w/ID amendments) | ||
| Illinois | 2008 (7/1/11 - commercial occupancies for areas outside of local jurisdictions that have adoption authority) | ||
| Indiana | 2008 Commercial with IN amendments (8/26/2009), 2017 (2018 IRC) One- and two-family dwellings with IN amendments (12/26/2019) | 2023 Update process underway (Effective date not established) | |
| Iowa | 2020 with IA amendments (4/1/2021) | 2023 update process underway (Effective date not established | |
| Kansas | 2008 (2/4/11 - State Fire Marshal) | ||
| Kentucky | 2023 (1/1/2025) | ||
| Louisiana | 2020 (1/1/2023) | ||
| Maine | 2023 with Maine amendments (7/1/2024) | ||
| Maryland | 2017 (2/7/2020) | ||
| Massachusetts | 2023 with MA amendments (2/17/2023) | ||
| Michigan | 2023 Commercial (3/12/2024) 2017 One- and two-family dwellings (2/8/2016) | Residential 2023 update process underway (Effective date not established) | |
| Minnesota | 2023 (7/1/2023) | ||
| Mississippi | Local adoption only | ||
| Missouri | Local adoption only | ||
| Montana | 2020 with MT amendments (6/10/2022) | ||
| Nebraska | 2023 (8/1/2024) | ||
| Nevada | 2017 (7/1/18 - Nevada State Pubic Works Division) | ||
| New Hampshire | 2020 with NH amendments (7/1/2022 with 6-month grace period permitting use of prior adopted edition) | 2023 update process underway (Projected 7/1/2025) | |
| New Jersey | 2020 with NJ amendments (9/6/2022) | ||
| New Mexico | 2020 (3/28/2023) | ||
| New York | 2017 (5/12/2020) | 2023 update process underway (Effective date not established) | |
| North Carolina | 2020 with NC amendments for other than one- and two-family dwellings (11/1/21) | 2023 update process underway (Projected 7/1/2025) | |
| North Dakota | 2023 (7/1/2024) | ||
| Ohio | 2023 Commercial (3/1/2024) | ||
| Oklahoma | 2023 (9/14/2024) | ||
| Oregon | 2023 with OR amendments (10/1/2023) | ||
| Pennsylvania | 2017 (2/14/2022) | 2020 update process underway (projected 7/13/2025) | |
| Rhode Island | 2020 (2/1/2022) | ||
| South Carolina | 2020 with SC amendments (1/1/2023) | ||
| South Dakota | 2023 (11/12/2024) with SD amendments | ||
| Tennessee | 2017 (10/1/2018) with TN amendments | ||
| Texas | 2023 (9/1/2023) | ||
| Utah | 2020 Commercial (7/1/2021) with UT amendments 2014 | ||
| Residential (7/1/2016) with UT amendments | |||
| Vermont | 2020 with VT amendments (4/15/2022) | ||
| Virginia | 2020 (1/18/2024) | ||
| Washington | 2023 (4/1/2024) | ||
| West Virginia | 2020 with WV amendments (8/1/2022) | ||
| Wisconsin | 2017 Commercial (8/1/2018) Residential (1/1/2020) | ||
| Wyoming | 2023 (7/1/2023) | ||
| Chicago | 2017 with Chicago amendments (3/1/2018) | ||
| New York City | 2008 w/NYC amendments (7/1/2011) | 2020 update process underway (Effective date not established) |
E-Brochures related to NEC Articles requiring surge protection.
| Segment | Description | Link |
|---|---|---|
| ALTERNATIVE ENERGY | Surge Protectors for NFPA 855, Standard for the Installation of Stationary Energy Storage Systems | Link |
| ELECTRICAL | NEC Article 708 Critical Operations Power Systems (COPS) | Link |
| ELECTRICAL | NEC Article 700 Emergency Systems | Link |
| ELEVATORS | NEC Article 620.51 elevators, dumbwaiters, escalators, moving walks, platform lifts and stairway chairlifts | Link |
| INDUSTRIAL MACHINERY | NEC Article 670 Industrial Machinery | Link |
| RESIDENTIAL | What Is The NEC Definition Of A Dwelling Unit? | Link |
Source: NFPA
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| 10108 USA Today Way Miramar, FL 33025 USA | Contact us to develop a surge mitigation solution for your application |
| citel.us | Where to purchase Citel SPD's |
