OP Original Poster? The conduit will lay flat in the concrete slab
OP Original Poster? The conduit will lay flat in the concrete slab
Additional information to further confuse the situation.
1. I have not been able to locate anything about this in the NEC. Penetrating a slab, yes, fire stopping a penetration, yes. Entering the slab at one end, exiting the slab at the other end ~60 feet distance, nothing.
2. 2000 IFC had 72 pages of info on electrical and fire ratings. 2009 IFC has almost nothing on fire rating.
3. Slab depth is yet to be determined. I see a 2" covering over the steel conduit with concrete fittings but little else.
4. We have done numerous installations with conduits in slabs in multistory buildings with NO questions from the inspectors.
5. This is not a slab on grade with conduits in the ground beneath the concrete installation. The conduits are in the second level, concrete floor of a new addition to a school.
6. I still have not found anything and so far the discussion suggests that there is nothing to find concerning this question.
7. I am looking for anything to assist me in informing the inspector that there is a derating of the fire rating or there is nothing to back up his question.
