NEC Code Quick Reference
Searchable reference for common National Electrical Code rules. Filter by category or search by keyword.
Reference Only — Not a Substitute for Professional Advice
This tool summarizes common NEC rules for educational purposes. Always consult the current NEC edition (NFPA 70), local amendments, and a licensed electrician for all wiring decisions. Local jurisdictions may adopt different code editions or add additional requirements.
About the NEC
The National Electrical Code (NEC), published by NFPA as NFPA 70, is the benchmark for safe electrical design, installation, and inspection in the United States. It is updated every three years; as of 2026, the 2023 NEC is the most current edition, though many jurisdictions still enforce the 2020 or 2017 edition.
The NEC is not federal law — it becomes law when adopted by a state or local jurisdiction. Always check which edition and local amendments apply in your area before starting any electrical work.