Cables, Raceways, or Boxes Installed in or UnderRoof Decking.
A cable, raceway, or box, installed in exposedor concealed locations under metal-corrugated sheetroof decking, shall be installed and supported so there isnot less than 38 mm (11⁄2 in.) measured from the lowestsurface of the roof decking to the top of the cable, raceway,or box. A cable, raceway, or box shall not be installed inconcealed locations in metal-corrugated, sheet decking?