Which NEC edition does each state enforce?

Every state and DC

Where these records come from

Each statewide record comes from the state's rule text, statute or code agency, not from trade trackers, and names it as the primary source. It is the same record the app carries offline in its Codes tab. Where a state has no statewide adoption there is no state rule to cite, so the records for Illinois, Kansas, Maryland, Mississippi and Missouri rest on local or secondary sources, and their pages say so.

Mixed means the state code does not reach every jurisdiction or building type the same way; each state's page says how. Current means adopted and enforced in that state today. NFPA publishes a new NEC every three years (the newest is 2026), and each state adopts it on its own schedule. Where cities and counties adopt their own edition, the one shown is the edition the app cites.

What changed in NEC 2026 · Calculation guides · Code questions