What is the maximum size for drainage openings permitted in boxes or conduit bodies in damp or wet locations?

The maximum size for drainage openings permitted in boxes or conduit bodies in damp or wet locations is indeed ¼ inch. This requirement is essential to ensure that water can easily drain out, preventing the accumulation of moisture within electrical enclosures. By limiting the size of these drainage openings to ¼ inch, the design helps to mitigate potential hazards associated with water ingress, such as corrosion or short circuits.

In damp or wet locations, larger openings could potentially allow debris or larger amounts of water to enter, which can increase the risk of electrical failure or compromise the integrity of the electrical system. Therefore, maintaining a smaller opening size allows for effective drainage while minimizing the risk of unwanted contaminants entering the enclosure.

Understanding this requirement is crucial for ensuring compliance with safety standards and protecting electrical equipment from moisture-related issues.