What requirement must be met by 15- and 20-ampere receptacles installed in wet or damp locations?

The requirement that 15- and 20-ampere receptacles installed in wet or damp locations must be listed weather-resistant type is based on safety and durability standards. These receptacles are designed to withstand exposure to moisture and other environmental elements, preventing electrical hazards such as short circuits or electric shocks. By being classified as weather-resistant, the receptacles provide enhanced protection against water ingress, meeting the needs of installations in areas subject to wet or damp conditions.

This specific requirement helps ensure compliance with established electrical codes, which prioritize safety in potentially hazardous environments. Using weather-resistant receptacles is essential for maintaining both functionality and safety in outdoor and moisture-prone indoor settings. Such standards play a crucial role in preventing electrical failures and protecting equipment and individuals from electrical dangers.