What NEC requirement must be met when installing electrical wiring in wet locations?

When installing electrical wiring in wet locations, the requirement to use waterproof materials is essential. The National Electrical Code (NEC) specifies that wiring and electrical components in areas exposed to moisture must be able to withstand wet conditions. This includes materials that are specifically designed to prevent water ingress and corrosion, which can lead to electrical failures, shorts, or hazards.

Waterproof materials such as sealed connections, weatherproof junction boxes, and insulated wiring are critical in ensuring safety and functionality in these environments. This requirement is particularly important in locations such as outdoor settings, basements, or areas subject to splashes or condensation, where standard materials may not provide adequate protection against the damaging effects of moisture. Failure to use waterproof materials can result in significant risks, including electrical shock and fire hazards.

Other choices do not address the specific safety concerns associated with moisture in electrical installations and lack the direct relevance to achieving compliance with NEC guidelines for wet locations.