Each state also makes a handful of their own amendments to the code, to account for local conditions and historic practices. An example of a local allowance (although probably informal city jurisdiction rather than statewide) is say allowing a two-family house to have only two electrical meters, rather than requiring an additional one for the "common areas", if it is owner occupied.
I guess technically the NFPA could revise what they publish as the "2014 NEC", creating some legal ambiguity. But in practice they just don't.
I misremembered. I think the requirement for separate electrical service for each residence IS a MA state amendment. And then town inspector's exception was that if something was owner-occupied, the extra common-area meter socket was still required, but installing it and building out the service panel was not.
Each state also makes a handful of their own amendments to the code, to account for local conditions and historic practices. An example of a local allowance (although probably informal city jurisdiction rather than statewide) is say allowing a two-family house to have only two electrical meters, rather than requiring an additional one for the "common areas", if it is owner occupied.
I guess technically the NFPA could revise what they publish as the "2014 NEC", creating some legal ambiguity. But in practice they just don't.