In general, how should raceways on the exterior surfaces of buildings be arranged?

When arranging raceways on the exterior surfaces of buildings, it is most important for them to be designed to drain properly. This consideration is crucial for maintaining the longevity and functionality of the raceways, as water accumulation can lead to corrosion, electrical failures, and even degradation of the building materials. Proper drainage helps prevent issues related to stagnant water, such as mold or structural damage, and ensures that any moisture is efficiently channeled away from critical areas.

Raceways that are not arranged with proper drainage can become hazardous over time, leading to a range of problems that would ultimately require costly repairs or replacements. While aesthetics, insulation, and minimizing exposure to elements are certainly relevant, the primary practical concern with raceway placement is the effective management of water drainage. Therefore, designing raceways to facilitate proper drainage is the most beneficial practice for ensuring their integrity and the overall safety of the building's electrical system.