What must transformers and power supplies for underwater luminaires be listed for?

Transformers and power supplies for underwater luminaires must be specifically listed for swimming pool and spa use due to the unique safety and performance requirements associated with installations in wet environments. Underwater luminaires are located in areas where they are exposed to water, which presents various electrical hazards that must be mitigated to ensure the safety of users and compliance with the National Electrical Code (NEC).

By being listed for swimming pool and spa use, these transformers and power supplies are designed and tested to operate safely in water-saturated environments. This type of listing indicates that the equipment has been constructed to withstand moisture, potential submersion, and other conditions that are unique to aquatic applications. Furthermore, equipment listed for swimming pool and spa use will adhere to specific standards that ensure protection from electrical shocks and hazards, which are critical for user safety in such installations.

Other categories, such as outdoor use or commercial use, do not necessarily encompass the same rigorous standards for underwater applications. Therefore, the specific listing for swimming pool and spa use is essential to ensure compliance with safety regulations and to protect both users and the installed equipment.