When can Electrical Nonmetallic Tubing (ENT) be stubbed out in a drop ceiling?
The building in question is 3 stories and the ceiling in the hallway is regular T-bar. A2. ENT is permitted exposed in wall, floors and ceiling (including suspended ceilings) in buildings not exceeding three stories [362.10(1)(a) and 362.10(5). However, in building exceeding three stories, ENT is only permitted to be installed concealed within walls, floors, and ceilings where the walls, floors, and ceilings that provide a thermal barrier having at least a 15-minute finish rating [362.10(2)]. ENT is permitted above a suspended ceiling in building exceeding three stories if the suspended ceiling provides a thermal barrier having a 15-minute finish rating [362.10(5)]. Exceptions to the two above rules permit ENT exposed in building (including above suspended ceilings) where a fire sprinkler system is installed in the building in accordance with NFPA 13-1999 Standard for the Installation of Sprinkler Systems. Q3. I was told by an inspector that 3-way or 4-way switches are required in room
