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.
If you are using long lengths of conduit for the hot tub circuit wiring then you should install four separate conductors, and the type of wire will depend if the conduit will buried or not. Type THWN wire is a good choice because it is rated for buried conduit applications. Using a Junction Box for Hot Tub Wiring. When using two types of wire or cable for a hot tub circuit a junction box may be installed in an accessible location where the wires may be spliced. Wire splices must be performed using corrosion inhibitor and approved wire splicing connectors.