Just to remind us that there's more to life than the NEC:
An Arizona home inspector has discovered there are local codes relating to the placement of light switches. I'm not going to open THAT debate here, but it is a reminder that you need to know more than just the NEC.
I'd say, at a minimum, your personal library should contain:
-- The NEC
-- Your power company standards (look to their web site)
-- "CodeCheck" from Tauton Press
-- The CFR section containing the ADA.
-- Any LOCAL codes.
