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.
Code required I bury my power lines. We dug a 4+ft trench and I ran the phone and cable wires through 2 PVC pipe and the power line through a seperate 4pcv pipe. All the wires could have been buried without PVC pipe but this is my home where I intend to live out my days, so the additional cost was a no brainer.