Now that computers are taking over the code book, I think it would be good if you could buy a CD/DVD with footnotes that reference the ROP/ROC language that resulted in the code we use.
Get a copy of the "preprint" or draft of the code. All of the changes have the proposal number listed so you can read the ROP info. The draft is free and you can download it from the NFPA or call 800-344-3555 and request that they send you a hard copy. Here is an example from the 2008 preprint:
(B) Dwelling Units. All 120-volt, single phase, 15- and 20-ampere branch circuits installed in dwelling units shall
be protected by a listed arc-fault circuit interrupter, combination type installed to provide protection of the branch circuit. [ROP 2–105, 2–142, 2–111]
Don
