What is the minimum height at which wet-niche luminaires must be installed above the normal water level of a pool?

The minimum height at which wet-niche luminaires must be installed above the normal water level of a pool is 18 inches. This requirement is established to ensure safety and compliance with the National Electrical Code (NEC) Article 680, which focuses on electrical installations in and around pools to prevent electrical shock hazards.

Installing wet-niche luminaires at a height of 18 inches helps protect electrical equipment from water infiltration and ensures a safe distance from the water's surface. This height minimizes the risk of electrical components being submerged or exposed to splashing water, which could lead to dangerous situations. Additionally, this requirement accounts for variations in water levels that may occur due to wave action, splashes from users, or other factors, thereby providing an effective barrier against potential electrical hazards while maintaining effective illumination for pool areas.

This aspect is critical in creating a safe recreational environment, illustrating the importance of adhering to NEC guidelines when installing electrical devices in aquatic settings.