National Electrical Code

State

NEC Edition

Comments

Alabama

2020

2020 effective 7/1/22. The codes and standards adopted by the Alabama Building Commission as the State Building Code apply to all State Buildings and Construction, Schools (Public and Private), Hotels/Motels, and Motion Picture Theaters.

Alaska

2020

Effective 4/16/20

Arizona

-

The NEC is not adopted at the state level. Each municipality is free to adopt and amend the NEC.

Arkansas

2020

With AR amendments effective 8/1/22

California

2020

Effective 1/1/23 with some CA amendments
2023 update process underway (projected 1/1/26)

Colorado

2023

Effective 8/1/23

Connecticut

2020

Effective 10/1/22 with CT amendments

Delaware

2020

Effective 9/1/21

District of Columbia

2014

Effective 5/29/20

Florida

2020

Effective 12/31/23

Georgia

2023

Effective 1/1/25

Hawaii

2020

Effective 3/4/23

Idaho

2023

2023 NEC effective 7/1/24

Illinois

-

There is no statewide adoption of the NEC. The state adopted the 2008NEC statewide effective July 1, 2011 for non-building code jurisdictions. The following local jurisdictions have adopted the 2008 NEC: Bloomington, Danville, Decatur, Glenn Ellyn, Mattoon, Normal, Rock Island, State of Illinois Capital Development, Washington.

Indiana

2008

Effective 6/2/09 Commercial, with IN amendments. 2017 one-and two-family dwellings with IN amendments.

2023 update process underway (effective date not established)

Iowa

2023

Effective 7/1/25 with IA amendments

Kansas

-

There is no statewide adoption of the NEC in Kansas. 2008 NEC was adopted by the state for state-owned buildings 2/4/11, but local jurisdictions can adopt and enforce different codes.

Kentucky

2023

Effective 1/1/25

Louisiana

2020

Effective 1/1/23

Maine

2023

Effective 7/1/24

Maryland

2020

Effective 5/29/23

Massachusetts

2023

Effective 2/17/23, with MA amendments

Michigan

2023

Effective 3/12/24 for Commercial.
One- and two-family dwellings 2023 underway (effective date not established)

Minnesota

2023

Effective 7/1/23

Mississippi

-

Local adoption only

Missouri

-

Local adoption only

Montana

2020

Effective 6/10/22 with MT amendments

Nebraska

2023

Effective 8/1/24

Nevada

-

The NEC is adopted and enforced at the local level.State Public Works Division is on the NEC-2017 effective 7/1/18.

New Hampshire

2020

Effective 7/1/22. 2023 update process underway (projected 7/1/25)

New Jersey

2020

Effective 9/6/22 with NJ amendments

New Mexico

2020

Effective 3/28/23

New York

2017

Effective 5/12/20.
2023 update process underway (effective date not established).

North Carolina

2020

Effective 11/1/21 with NC amendments for other than one- and two-family dwellings.
2023 update process underway (projected 7/1/25)

North Dakota

2023

Effective 7/1/24

Ohio

2023

2023 for Commercial effective 3/1/24.
Residential with OH amendments 4/15/24

Oklahoma

2023

Effective 9/14/24.

Oregon

2023

Effective 10/1/23 with OR amendments

Pennsylvania

2017

Effective 2/14/22
2020 update process underway (projected 7/13/25)

Rhode Island

2020

Effective 2/1/22

South Carolina

2020

Effective 1/1/23 with SC amendments

South Dakota

2023

Effective November 12, 2024 with SD amendments.

Tennessee

2017

Effective 10/1/18 with TN amendments

Texas

2023

Effective 9/1/23

Utah

2020

2020 for Commercial (7/1/2021); 2014 (2015 IRC) for One- and two-family dwellings (7/1/2016)

Vermont

2020

Effective 4/15/22 with VT amendments.

Virginia

2020

Effective 1/18/24

Washington

2023

Effective 4/1/24

West Virginia

2020

Effective 8/1/22 with WV amendments.

Wisconsin

2017

Effective 8/1/18 Commercial 8/1/18, Residential 1/1/20

Wyoming

2023

Effective 7/1/23