I see it everywhere I go in the C store world, last code update class I had the head State inspector was allowing it above suspended ceilings also. Not sure if the they amended the code or he just allows though??
#98113 - 05/04/0605:38 PMRe: NM in Commercial Bldgs.
Ryan- You are correct in that the type of construction wording came in in the '02. BUT- The wording only said that Class III, IV and V construction permitted NM cable with no floor limitation. This was challenged at our State Appeal board and it was decided that since it was not shown as "Uses not Permitted" that it would be allowed in all types of construction. In the '05 code they nailed it by the wording in 334.12(A)(1). Jeff Sargent and a few other noteables were involved with the State decision. I think the code panel goofed in '02 and they corrected it in '05. The problem is making a "Uses Permitted" all inclusive and there in lies the loop hole. I don't know if you knew it or not but Michigan has for at least 25 years allowed NM cable with no limitations on structure type or floor height. There track record is in tact and they are not burning down any high rise buildings due to NM cable. So until they see a convincing arguement to disallow NM cable, we will be using it by amending out wording that would prohibit it's use.
[This message has been edited by George Little (edited 05-05-2006).]
#98118 - 05/05/0608:33 PMRe: NM in Commercial Bldgs.