What type of fittings must be used for raceways entering the side of an outdoor loadcenter above the level of uninsulated live parts?

The correct choice of wet location fittings for raceways entering the side of an outdoor loadcenter is based on the potential exposure to moisture and environmental conditions. Outdoor load centers are typically subject to direct exposure to precipitation and high humidity. Therefore, fittings used in these conditions need to be designed to prevent water ingress, which could lead to short circuits, corrosion, and other electrical hazards.

Wet location fittings are specifically engineered to maintain their integrity and functionality in damp or wet conditions, ensuring that the raceways and associated connections are protected from moisture. This protection is paramount since moisture can compromise insulation and safety, leading to failure of the electrical system.

In contrast, dry location fittings do not provide the same level of moisture protection and are only suitable for environments where humidity and water exposure are minimal. Indoor location fittings would not be appropriate for outdoor installations where weather elements are a concern. Special purpose fittings might have specific applications but wouldn’t inherently possess the moisture resistance required for an outdoor loadcenter.

Thus, the requirement for wet location fittings ensures safety and compliance with electrical codes for installations subjected to the elements.