Lamp holders installed in wet locations shall be listed for use in what type of locations?

Lamp holders installed in wet locations must be listed specifically for wet locations according to the National Electrical Code (NEC). This requirement ensures that the lamp holders are capable of withstanding exposure to moisture and water without risking electrical failure or safety hazards.

Wet location-rated fixtures and lamp holders are designed to prevent the ingress of water and are often tested for their ability to operate safely when subjected to such conditions. Using a fixture that is not rated for wet locations in these environments can lead to short circuits, electric shocks, and potential fire hazards, making it critical to adhere to this standard for safety.

Damp locations, while they may tolerate some moisture, do not meet the stringent criteria necessary for areas directly exposed to water. Similarly, dry locations and hazardous locations have their respective designations and safety requirements, which do not align with those necessary for applications in wet environments. Therefore, selecting lamp holders rated for wet locations is essential for maintaining safety and compliance with NEC regulations in such areas.