What is the required IP enclosure rating for panelboards located in damp conditions?

The required IP enclosure rating for panelboards located in damp conditions is IP44. This rating indicates that the enclosure is protected against solid objects larger than 1 mm and is also protected from water splashes coming from any direction. In damp environments, it is essential for electrical equipment to have a proper level of sealing to prevent moisture ingress, which could lead to short circuits or other hazards.

IP (Ingress Protection) ratings are defined by international standards, specifically IEC 60529, which classifies the degree of protection offered by enclosures against intrusion from solid objects and liquids. While options like IP55 and IP56 offer higher protection against water, they are not typically required in all damp conditions. The IP44 rating is generally considered adequate for most applications involving panelboards in environments that experience some moisture, making it the correct choice in this scenario.