What Electrical Code Does Idaho Use?
Idaho enforces the 2026 edition of the National Electrical Code (NEC 2026).
- Code edition
- NEC 2026
- Adoption type
- Statewide adoption
- Data current as of
- July 6, 2026
Adoption details
Idaho runs one of the fastest adoption cycles in the country and moved to the 2026 NEC in 2026. Confirm the permit cutover date with the Idaho Division of Occupational and Professional Licenses.
The AHJ decides. Always verify locally
State adoption sets the baseline, not the final word. Cities and counties can layer amendments on top of the state code, run behind or ahead of the state's edition, or, in local-adoption states, enforce a different edition entirely. The enforceable code for any project is whatever the authority having jurisdiction issuing the permit says it is. Confirm the edition and local amendments with the AHJ before design or bid. Adoption status also changes on state rulemaking cycles; this page reflects reconciled adoption-tracker data as of July 6, 2026.
Calculators for Idaho electrical work
Every calculator on this site documents the National Electrical Code table and edition it implements, so results can be checked against the edition enforced in Idaho.
Preparing for the Idaho exam?
Journeyman and master licensing exams reference the adopted NEC edition, so knowing Idaho enforces the NEC 2026 tells you which code to study. Drill the calculations and code lookups with the free journeyman electrician practice test and master electrician practice test before test day.
Continuing education and exam prep
Many licensing jurisdictions require continuing education hours each renewal cycle. Mike Holt's continuing education courses are organized by state, and his exam preparation programs cover journeyman and master license exams. Confirm any course is approved for your license and jurisdiction in Idaho before enrolling.
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Results are for reference only. Verify against the applicable adopted edition of the NEC and consult a licensed electrician for code compliance.