Program Requirements. Some essential, basic information about your program can be found in the Graduate Programs in the Graduate Catalog, including the program description, curriculum, and contact information. Doctoral Students. For your program's handbook, go to Graduate Handbooks and select your graduate program.
The National Electric Code requires that wire placed in Schedule 80 PVC must be buried at least 18 inches below ground. If the wire is being buried without PVC, it must be at least 24 inches underground.
Anytime you run a line underground to a light or building, put it inside plastic pipe and bury it a foot deep. I dug into a buried line on my daughters flower garden It was going to a storage shed and was about 6 inches deep and not encased in plastic.