Joe,
Is it your position that the 1/4" KOs are the weep holes and that they must be knocked out when installing a 3R enclosure in a wet location? I've never seen an enclosure that was rated only as a 3R without small holes in the back corners of the bottom. The picture in Sparky66wv''s post of 9/14 at 9:57PM is a perfect example of this type of enclosure. The weep holes are open and there is a 1/4" KO for other use. The weep holes are open when the enclosure is shipped and are too small to be used for the grounding conductor. I have worked on some dual rated enclosures that came with instructions to remove a screw from the weep holes when used as a 3R enclosure.
Don
