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.
1. Cable installation depth: up to 40 inches. The depth that fiber cables should be buried is determined by the soil conditions and surface usage. In colder areas, fiber cables are typically buried below the frost line to prevent the cables from being damaged by ground frost heaves.2. Keep the trenches as straight as possible. Fiber cable trenches should be straight, and the trench bottom should be flat and level.n colder areas, fiber cables are typically buried below the frost line to prevent the cables from being damaged by ground frost heaves. 2. Keep the trenches as straight as possible. Fiber cable trenches should be straight, and the trench bottom should be flat and level.