Dig the trench. If you are using EMT conduit or UF cable, the trench should be 12 inches deep. Rigid metal or plastic conduit requires a 6-inch depth
This must be the question I missed on my license exam. I thought that in most circumstances UF needed to 24" deep in a yard unless covered with 2" of concrete. I didn't even know you could bury EMT and I thought rigid needed to be 18". I guess you learn something every day.
