It does cover some basic material like some books, but it also gets real with the requirements. It goes from basic equipment and wiring to industrial and commercial applications. It references NEC sections and also gives practical comments relative to the cite. It goes into deep detail for just about everything.
In the section on Service Entrance and Grounds for example, it cites 250.64 as the methods for installing the grounding electrode conductor. Says that it must never be smaller than 8 AWG but you can size it larger. When using a made electrode, it never needs to be larger than 6 AWG. Then in the next paragraph, the authors say "If the service wires are 2 AWG or smaller, the NEC permits an 8 AWG ground wire. Don't use it; use 6 AWG. Number 8 AWG must be enclosed in conduit or armor regardless of circumstances but for 6 AWG this is not required. The cost of material when using 6 AWG is lower than when using 8 AWG and it takes less time to install the 6 AWG."
Good book, not cheap. I paid about $46 at Amazon, list price is $69.95.
