What must cabinets or cutout boxes installed in wet locations be?

Cabinets or cutout boxes installed in wet locations are required to be weatherproof because they need to be able to withstand exposure to moisture and precipitation without allowing water to enter. Weatherproof construction ensures that these electrical enclosures are sealed adequately to prevent the ingress of water and protect the internal components from damage, which could pose a safety hazard.

This adherence to weatherproof standards is pivotal for ensuring both the longevity of the installation and the safety of the electrical system. In wet locations, any compromise to the integrity of the enclosure could lead to electrical failures or even dangerous situations like short circuits or fires. Thus, it's crucial that weatherproof materials and designs are utilized for any electrical equipment positioned in environments where it may be consistently exposed to water.