I was over-ruled on the gaskets and told that since the enclosure and disconnect are 3R, the horizontal run does not need gaskets. They are not sealing it in any way shape or form.

I was told that the enclosures are allowed to leak as long as it doesn't short anything out.

Which brings up a question. In order to be rain-tight the EMT fittings are required to have the proper (new) gasketing in the throat per UL. Don't they also require a seal where they mount to the enclosure? What is the point of the throat not leaking if the connection to the enclosure does.

If the enclosures are 3R "rain-tight", shouldn't exterior connections open to the weather be "rain-tight"?

Robert