NEC^® Adoption List

State

NEC Edition

Comments

Alabama

2014

Effective October 1, 2016. The AERC Board has adopted the 2015 International Energy Conservation Code as the Alabama Residential Energy Code and the 2015 International Residential Code as the Alabama Residential Building Code. This incorporates the 2014 NEC.

Alaska

2017

The Alaska Administrative Code, now adopts by reference the 2017 National Electrical Code and the 2017 National Electrical Safety Code (ANSI C2-2017). Both codes became effective on May 9, 2018.

Arizona

-

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

Arkansas

2017

Effective 1/1/18

California

2017

Effective on January 1, 2020. The 2019 building codes for California include the 2017 NEC (found in the California electrical code) and exams will be based on the 2017 NEC.

Colorado

2020

Effective 7/1/20

Connecticut

2017

Effective October 1, 2018

Delaware

2020

As of September 1, 2021

District of Columbia

2011

District of Columbia adopts the 2013 DC Construction Codes March 28, 2014. The 2013 Construction Codes are based on the 2012 model codes published by the International Code Council (ICC), and the 2011 National Electrical Code with amendments to reflect unique District policies and characteristics.

Florida

2017

The 7th Edition (2020) Florida Building Code in effect on December 31. 2020. The 2020 edition is based on the 2018 I-Codes and includes adoption of the 2017 NEC.

Georgia

2020

effective January 1, 2021

Hawaii

2017

Effective 8/21/18

Idaho

2017

2017 NEC effective July 1, 2017

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 6/2/2009. Deleted all Arc-Fault circuit protection and Tamper Resistant Receptacle requirements.

Iowa

2020

Effective 4/1/21

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

2017

The 2018 KBC and the 2018 KRC went into effect on Aug. 22, 2018. The mandatory effective date for the 2018 KBC and the 2018 KRC is Jan. 1, 2019.

Louisiana

2014

Effective 2/1/2018

Maine

2020

Effective July 2, 2021

Maryland

2017

Adoption of 2018 edition of I-codes and other codes, includes the 2017 NEC, effective 2/7/20.

Massachusetts

2020

Effective January 1, 2020

Michigan

2017

2017, effective January 4, 2019. The Michigan Department of Licensing and Regulatory Affairs (LARA) has updated the MI Part 8 Rules Electrical Code (2017 NEC) for 3-family and larger and commercial structures in the state.

Minnesota

2020

2020 Effective November 17, 2020

Mississippi

2014

Effective 5/1/2017. The updated MFPC is based on the 2015 International Building Code, 2015 International Fire Code, and 2015 International Residential Code. The 2014 National Electrical Code and NFPA 72-2013 are adopted as referenced. The MFPC applies to all state owned buildings, places of assembly, buildings over 75' in height, correctional facilities, and private fraternity and sorority houses. Jurisdictions may adopt local fire codes that are not less stringent than the MFPC, as determined by the State Fire Marshal.

Missouri

-

The NEC is adopted and enforced at the local level. The city of St Louis adopted 2017 NEC effective 8/1/18.

Montana

2020

Effective June 10, 2022

Nebraska

2017

2017 NEC with an effective date of August 1, 2017

Nevada

-

The NEC is adopted and enforced at the local level.State Public Works Division is on the NEC-2011 effective 7/1/13.

New Hampshire

2020

Effective July 1, 2022

New Jersey

2017

2017 NEC effective September 3, 2019, as part of the makeup of the new Uniform Construction Codes (UCC) for the State.

New Mexico

2017

2017 NEC effective 2/1/2018

New York

2017

2017 NEC effective 5/12/2020. The official effective date of the 2020 New York State Uniform Fire Prevention and Building Code and State Energy Code, which references the 2017 National Electrical Code, is May 12, 2020, for all local jurisdictions statewide except for the City of New York.

North Carolina

2020

Effective November 1, 2021, supplemented by State Amendments.

North Dakota

2020

2020 NEC with an effective date of 1/1/2021

Ohio

2017

Effective November 1, 2017 for all occupancies excluding 1-, 2-, & 3-Family dwellings.

Oklahoma

2017

Effective September 14, 2021

Oregon

2020

The new 2021 OESC, based on the 2020 National Electrical Code (NEC), has been adopted and becomes effective April 1, 2021.

Pennsylvania

2017

Effective 2/14/2022

Rhode Island

2020

Effective 2/1/2022

South Carolina

2017

Effective 1/1/2020

South Dakota

2020

Effective July 1, 2020, with exceptions.

Tennessee

2017

Effective date October 1, 2018

Texas

2020

2020 NEC effective November 1, 2020

Utah

2020

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

Vermont

2017

Effective October 1, 2017, with a few state-specific amendments.

Virginia

2017

Effective July 1, 2021

Washington

2020

2020 NEC was adopted with minimal amendments, effective 10/29/20.

West Virginia

2020

As of August 1, 2022

Wisconsin

2017

Effective 8/1/18 for commercial structures; planned adoption for one- and two-family dwellings is January 2020.

Wyoming

2020

Effective 7/1/2020