And I agree with reno that the drift to areas clearly regarded as design issues, in direct violation of art. 90.1c which specifically points out that "This Code is not intended as a design specification nor an instruction manual for untrained persons."
(Bold emphasis mine.)
It may not be intended as such, but this is exactly what it is. Many installations require no design at all outside of compliance with NEC- if that doesn't should "design guide!" I don't know what does. If you look at any document that does purport to being design specs (MIL-HDBKs and the like), you'll find they're remarkably similar.
