Dave, how can an installation be arrainged to drain if it's raintight?
The new fittings are supposed to be absolutely water tight, yet the wording of 225.22 tells us to provided an opening in the raceway.
Whether it's due to condensation, water pressure, or flooding, the point is, there will be moisture in the raceway and the NEC recognizes it, this is why we use "W" type conductors.
Roger
[This message has been edited by Roger (edited 08-27-2005).]