Where not subject to "physical damage", Type AC cable shall be permitted as follows:
(1) In both exposed and concealed work .....
The key is "physical damage" ---- and at the floor level, there can be a possibility of damage caused by a floor polisher or other equipment. I would use a piece of rigid metal conduit as a sleeve just to be on the safe side.
Joe Tedesco, NEC Consultant
Re: AC/BX Cable run through floor#80668 05/13/0208:57 PM05/13/0208:57 PM