- Location
- Massachusetts
I wouldn't want to put EMT on a roof anyway... the salt spray in the air around here would turn it into a rusty blob in no time at all.
But that being said... I say yes, the 310.15(B)(2)(c) adjustment factors would apply to EMT on a rooftop. Just because the CMP screwed up and specified "conduit and cables" instead of a more general term like "raceway," doesn't mean that the rooftop raceway will suddenly become a safe installation if it's installed in something other than "conduit." I don't think it would make it up the food chain very far if you appealed it - people are human, even, unbelievably, the Code Making Panel - and they can mess up. I bet they could find a method in the bureaucracy somewhere to make an "emergency code correction addendum" or some such were it necessary.
The NEC is adopted as law, the words matter. If they chose the wrong words then that is a problem. They can not just say 'sorry we meant this, not that'.
BTW the NFPA could release a "TIA" Temporary Interim Agreement" to fix this if they want to.