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.
Direct burial cable is a special type of electrical wiring, or cable, that is designed to be run in a trench underground. The electrical wires in the cable are encased in a thermoplastic sheath that seals out moisture and protects the wires within. While direct burial cable can be run inside conduit for additional protection, the cable is designed to withstand direct exposure to soil and moisture and is rated for wet, dry, and damp environments.