Great question — answering as the UphillTech team:
Stev, the usual answer when it comes to the NEC is that ours is not to reason why because code is code. It has been said here a hundred times that most of the NEC came about as the result of death, injury or fire that resulted from doing things another way. That being said, you sound like a candidate to buy the annotated version of the NEC. It comes in a hardbound book form, much thicker than the straight code, and it contains a huge amount of commentary by the working groups that have created the NEC and kept it up to date. All commentary is shown in blue text, so you can instantly tell that it's not part of the code itself, but background that explains the whys and wherefores. It also...
Full answer by MTA: https://diy.stackexchange.com/a/331958 (CC BY-SA 4.0).
Need it done for your business? UphillTech.
