So, I am pretty sure I know thge answer to this question, but looking for thought on this....
Here's the situation:
Water bond, +/or GEC (Supplimental) on the other side of building from Main. There's a slab being poured between each location, so I suggest conduit in slab for this, as it wont be possible to do latter due to steel in the way. PM orders 2 steel 90's and a bunch of PVC. (PVC is not allowed above slab in AHJ...) This is how many circuits are done.... So, here's where I need the fine opions of our members....
250.92(3)
Any metallic raceway or armor enclosing a grounding electrode conductor as specified in 250.64(B). Bonding shall apply at each end and to all intervening raceways, boxes, and enclosures between the service equipment and the grounding electrode.
My answer: It should be Non-metalic the whole way, (Not allowed here) or it should be metalic the whole way. As you could not bond the ends of the 90's or other conduit below slab. What do you think?
