Which NEC edition does my state use?
Our code tools use the 2023 NEC. Many states enforce an older or newer edition, and cities can amend it. Pick your state to see what we have verified from the state's own pages. We list only states we have checked; for the rest we say so rather than guess.
Basis
Each record cites a state agency page and the date we checked it. Adoption dates and local amendments change; confirm with your local building department before you buy materials or pull a permit.