Which location is required to have electrical installations comply with the NEC?

• A. Underground mine
• B. Electrically powered automobiles
• C. Marinas
• D. Aircraft converted for private use

Answer: (C)

Electrical installations in marine environments are specifically covered by the NEC through Article 555, which governs marinas and boatyards. This part of the code addresses the unique conditions you find at docks—wet or damp locations, salt air, corrosion, and the need for safe shore power connections, weatherproof enclosures, proper grounding, and GFCI protection. Because of these specialized requirements, marinas are the location where NEC compliance is explicitly required.

Underground mines follow mining-safety standards rather than marina-specific NEC provisions, and electrically powered automobiles and aircraft rely on standards tailored to vehicles and aviation, not the marina section of the NEC.