FWIW, and keep in mind that the OP is from MA....formal interpetations here come from the Department of Fire Services, the same department that writes/ promulgates the MA Electrical code. (NEC 2026 with MA amendments)
I don't find much value in the handbook in the last 20 years, compared with just throwing out any question on this site. This site has been a game changer in this industry, IMO. Go back to the 80's or 90's and there was more value with having a handbook.
I haven't had a handbook in years, but my father still buys one.
I do see the "value" in buying an older handbook. All but the newest changes will be covered. I like that idea.
