A typical wet niche fixture must be installed above the waterline by at least how much distance?

A typical wet niche fixture must be installed above the waterline by at least 18 inches to ensure safety and compliance with electrical code requirements. This distance is critical because it helps prevent any potential electrical hazards, such as electrocution, that could arise from water splashing onto the fixture or from the risk of water levels fluctuating. Adequate spacing also ensures that fixtures are not submerged, which could lead to premature failure of the electrical components or build-up of moisture therein. Additionally, adhering to this height provides a margin for error in case water levels rise, ensuring that the fixture remains safe to use and compliant with safety standards.