The short answer
Tennessee's state code is based on NEC 2017, the current edition there, in effect since February 2, 2017, but it does not reach every jurisdiction or building type the same way.
- Current edition
- NEC 2017 (current)
- Adoption
- State code, with exceptions by jurisdiction or building type
- In effect since
- February 2, 2017
- Primary source
- www.tn.gov
Code adoption cycles change. Always confirm the edition and amendments in force with your Authority Having Jurisdiction (AHJ) before permitting work.
How does Tennessee adopt the NEC?
Tennessee's State Fire Marshal's Office electrical program (Rule 0780-02-01) adopts NEC 2017 for jurisdictions without their own program; Nashville, Memphis, Knoxville and other local programs adopt their own editions and amendments. The 2025 rule update (0780-02-02) moved building and fire codes to 2021 editions without changing the electrical chapter.
What are Tennessee's amendments to the NEC?
The app's record for Tennessee lists no individual amendments; the adoption summary above says how the state applies the code.
Who issues electrical permits in Tennessee?
Local building departments issue permits and inspect under the statewide code floor; local jurisdictions may not go below state minimums.
Who licenses electricians in Tennessee?
Statewide licensing of electrical contractors through the Board for Licensing Contractors; the State Fire Marshal's Office governs code adoption. Licensing board: Tennessee Department of Commerce and Insurance - Board for Licensing Contractors.
Tennessee Department of Commerce and Insurance - Board for Licensing Contractors
Is Tennessee moving to a newer NEC edition?
The State Fire Marshal's electrical program (Rule 0780-02-01) still adopts NEC 2017; the 2025 rule update moved building and fire codes to 2021 editions but not the electrical chapter. Nashville, Memphis, Knoxville and other local programs adopt independently.
Is Tennessee on NEC 2026?
No. NEC 2026 is the newest edition; the one current in Tennessee is NEC 2017, three editions older. NFPA publishes a new edition every three years and each state adopts on its own schedule.