State

Current Adopted Edition of NEC (Effective Date)

NEC Update Status (Effective Date)

Alabama

2014 (July 1, 2016 (Alabama Division of Construction Management))

Alaska

2017 (5/9/2018)

Arizona

Local adoption only

Arkansas

2017 with AR amendments (1/1/2018)

California

2017 with CA amendments (1/1/2020)

Colorado

2020 (7/1/2020)

Connecticut

2017 (10/1/2018)

Update process (2020) underway (Effective date not established)

Delaware

2014 (3/11/2016)

Update process (2017) underway (Effective date not established)

Florida

2017 (7/1/2017)

Georgia

2020 (1/1/2021)

Hawaii

2017 (8/21/2018)

Idaho

2017 (7/1/2017)

Update process (2020) underway (7/1/2021)

Illinois

2008 (7/1/11 – commercial occupancies for areas outside of local jurisdictions that have adoption authority)

Indiana

2008

Update process (2017) underway (effective date not established)

Iowa

2020 with IA amendments (4/1/2021)

Kansas

2008 (2/4/11 – State Fire Marshal)

Kentucky

2017 (1/1/2019)

Louisiana

2014 (2/1/2018)

Maine

2017 with Maine Amendments (11/16/2017)

Update process (2020) underway (Effective date not established)

Maryland

2014 (1/1/2015)

Massachusetts

2020 w/ MA amendments (12/27/2019)

Michigan

2017 Commercial (1/4/2019)

One- and two-family dwellings (2/8/2016)

Minnesota

2020 (11/17/2020)

Mississippi

Local adoption only

Missouri

Local adoption only

Montana

2014 (10/23/2014)

Update process (2017) underway (effective date not established)

Nebraska

2017 (8/1/17)

Update process (2020) underway (effective date not established)

Nevada

2011 (7/1/13 – Nevada State Public Works Division)

New Hampshire

2017 with NH amendments (1/1/2018)

Update process (2020) underway (effective date not established)

New Jersey

2017 (9/3/19 with 6-month grace period for new permits)

New Mexico

2017 (2/1/2018)

Update process (2020) underway (effective date not established)

New York

2017 (5/12/2020)

North Carolina

2017 (6/12/2018)

Update process (2020) underway (Effective date not established)

North Dakota

2020 (1/1/2021)

Ohio

2017 Commercial (11/1/2017)

2017, with Ohio amendments

One-, two-, and three-family dwellings (7/1/2019)

Update process (2020) underway (Effective date not established)

Oklahoma

2014

Commercial (11/1/2017)

Residential 2015 IRC Electrical Chapters (11/1/2016)

Update process (2017) underway (effective date not established)

Oregon

2020 with OR amendments (4/1/20201)

Pennsylvania

2014

Update process (2017) underway (Effective date not established)

Rhode Island

2017 (8/1/2019)

Update process (2020) underway (effective date not established)

South Carolina

2017 with SC amendments (1/1/2020)

South Dakota

2020 (7/1/2020)

Tennessee

2017 (10/1/2018)

Texas

2020 (11/1/2020)

Utah

Commercial (7/1/2018)

2014

One- and two-family dwellings (7/1/2016)

Update process (2020) underway (7/1/2021)

Vermont

2017 with Vermont amendments (10/1/2017)

Update process (2020) underway (Effective date not established)

Virginia

2014

Washington

2020 (10/29/2020)

West Virginia

2017 (3/24/2020)

Wisconsin

2017

Commercial (8/1/2018)

One- and two-family dwellings (1/1/2020)

Wyoming

2020 (7/1/2020)