There are metallic and nonmetallic NEMA 3 & 4 enclosures available, but none that meet all the "requirements" of this installation. I have a plastic NEMA 3 on the way in from Amazon, and have been playing with a couple of steel enclosures that I have here. Preferences are that the boxes be no more than 4" deep, no knockouts on top or sides, latch closure rather than screwed on, gasketed and hinged face rather than removable, either plastic or, if metal, just deep enough to allow for a panel of rigid insulating foam to reduce heat gain on a south facing wall in the desert. The electronics are IP67 and rated for operation between -40C to 60C, so heat might be a problem, hence the preference for plastic. Prefer ABS to PVC or to what the manufacturers refer to as "weather resistant plastic alloy." One box will have a 240W 24V solid state power supply and a single RF receiver. Other box will have a 100W transformer with three programmable IR receivers, so needs to have a door that is relatively easy to open for programming the remotes. Both supplied with 110 line voltage. Thought it would be simple to just buy a couple of boxes and screw them to the wall. But, noooooo......