Merlin:
"(B) Nonrated Construction. In addition to the wiring methods of 518.4(A), nonmetallic-sheathed cable, Type AC cable, electrical nonmetallic tubing, and rigid nonmetallic conduit shall be permitted to be installed in those buildings or portions thereof that are not required to be of fire-rated construction by the applicable building code.
FPN: Fire-rated construction is the fire-resistive classification used in building codes."
Fire rated construction ratings are determined from the Building Codes that are adopted in your state/area.
Are there any plans? The info you need should be on the cover page of the plans. You may be able to access the local building codes on your state/local websites.
IMHO, the apt floor/assembly ceiling component will be 'rated', probably 1 hr; possibly 2 hr., but this is only my guess.
