Walrus- Those boxed look like NEMA-3R (raintight) to me. Would this stuff be required to be explosion-proof? How big must the tanks be- and does this apply only where you are pumping LPG? I'm not being silly- I note that LPG vendors are x-proof, but no households are- and some of them have some BIG tanks! Incidentally, NEC defines the zone as 20 feet from the tank.
All the fittings look like they are class 1 so the reasoning behind the Nema 3R box at the top of the pole seems to escape me. looks like the seal-off under the start/stop would have been alot of fun to pour. The motor seems a bit out of place as well.