I rewired one house completely to code, ran 220 into one garage to power my stick welder. I also wired the cabin we currently occupy and the unattached garage. Both meet the NEC standards and passed inspection with no problems. I also hold an AS degree in avionics repair (graduated second in my class). I hold the amateur radio Extra Class license and a commercial license,General Radiotelephone Operators License with the radar endorsement. Just for an exercise you might take a look at a practice exam for GROL, you can find it at aa9pw.com just scroll down to commercial, elements 1,3 & 8.
Have fun, and for those that really tried to help thanks, I'll even sign my name to this one.
\Michael L Knapik, KN5P