I am planning on mounting lights to the outside of my corregated metal garage. I had planned on using white aluminum wet location boxes that have two mounting ears that screw directly to the metal and running pvc conduit (1/2 inch) throught the metal siding into the back of the box opening. I am hoping this gives the best weathertight seal.
Is it allowable to have pvc go into a metal box? Also, I planned on drilling the closest as I can the exact size hole of the conduit in the metal to eliminate a possible leak and using silicone. If I have to use a threaded fitting into the back of the housing, wont that size be impossible to duplicate? Is there a better way to do this?