Who has the final authority in interpreting the National Electrical Code?

The local inspector holds the final authority in interpreting the National Electrical Code (NEC) as it applies to specific installations within their jurisdiction. Local inspectors are responsible for interpreting codes in the context of local laws, amendments, and conditions of the specific area they serve. This localized approach allows them to consider unique building practices, safety standards, and community needs.

The NEC is a set of guidelines developed to ensure safe electrical installations across the country, but it also allows for some interpretation based on state or local modifications. While federal and state inspectors may provide oversight and establish broader regulatory frameworks, it is the local inspector who applies these codes during inspections of electrical work, ensuring compliance with both the NEC and local regulations.