What is a key installation requirement for outdoor luminaires?

The requirement that outdoor luminaires must be rated for outdoor use and installed according to exposure considerations is crucial for ensuring safety and functionality. Outdoor luminaires are subjected to various environmental factors, such as rain, snow, extreme temperatures, and UV radiation. If a luminaire is not specifically designed for outdoor conditions, it could suffer from premature failure, risk of electrical shock, or even fire hazards due to water ingress or overheating.

Furthermore, installation according to exposure considerations means taking into account factors like mounting height, orientation, and the materials used in construction to ensure durability and effective lighting. By following these guidelines, installations maintain compliance with the National Electrical Code, thereby enhancing safety and performance in outdoor environments.