Many Thanks Marc.
The location could be underground, since this arbor soaks in the rain, and takes days to dry.
Yes, PVC to NM conduit body would be a much better design. The metal Bell boxes also disintegrate rapidly in this area.
Thanks for describing the vaportight gasket issue. Gasket, box, & fittings could be tested by removing jars to a water bucket.
Drain holes only for stubborn condensation makes sense, since water leaks can fault, needing repair or replacement.
Best regards to you & yours.
