What is the typical diameter of a drain hole placed on each pan of aluminum bus work?

The typical diameter of a drain hole placed on each pan of aluminum bus work is 1/4 inch. This size is designed to effectively handle moisture and condensation that may accumulate within the bus structure without compromising the integrity of the bus itself. A 1/4 inch opening allows for adequate drainage while minimizing the risk of debris or contaminants entering the bus work, ensuring that the electrical components remain protected and functioning properly.

The choice of a 1/4 inch diameter strikes a balance between being large enough to facilitate drainage yet small enough to prevent excessive exposure to the environment. This is particularly important in maintaining the operational reliability and safety of the equipment, as inadequate drainage could potentially lead to issues such as corrosion or short circuits over time.