I saw these coming home the other day. These were taken at a liquor store near my house. The funny part is once inside I noticed they were in the process of installing security cameras...I wonder how that will turn out. Guess I better hurry up and drink my beer so I can take more pictures huh?
Let's see weather proof covers, Check Plenty of Support for conduit, Check Weather proof fittings, Check If this was in the Mojave desert, it might not have any moisture problems.
I agree with the above, you either hit the structure inside or you have trouble with anything more than the smallest raceways and boxes.
In a pinch I have used toggle bolts on this with a fender washer to cover the hole. A little spray paint that is a close match hides the washer pretty well compared to leaving it shiny zinc.
This is a poor option if you can see it from inside the building though.
If I had to do that job in the picture (with the right boxes) I would probably use at least four #12 fasteners and a full layer of silicone adhesive between the box and the wall.
Bob
Bob Badger Construction & Maintenance Electrician Massachusetts