Is there any code or UL restriction prohibiting installing romex conductors in emt without the exterior sheathing?
I have 5 circuits, 4 of which are 12/2, and one is 14/2. The circuits go from the attic, down a pipe chase, to the basement, which has a finished ceiling. I want to install the romex (after stripping the sheathing off) in 3/4 emt, and run it back to the panel.
I have 5 circuits, 4 of which are 12/2, and one is 14/2. The circuits go from the attic, down a pipe chase, to the basement, which has a finished ceiling. I want to install the romex (after stripping the sheathing off) in 3/4 emt, and run it back to the panel.
The code allows fifteen # 12 conductors in 3/4 emt. I will have 8, plus two #14 conductors . All grounds count as 1 . Thus 15 conductors total.
The code allows fifteen # 12 conductors in 3/4 emt. I will have 8, plus two #14 conductors . All grounds count as 1 . Thus 15 conductors total.
You have 10 CCC's. T 310.15(B)(2)(a) tells us the conductors need to be derated by 50%. There for your 12's will need 15A OCPD's and your 14's 12?A breakers.:grin:
12?A breakers. Can you get those in AFCI Breakers Chris?:grin:
You are correct. I will need to install 2 raceways of 1/2" emt in order to maintain the conductor rating. Or, cut holes in the ceiling, bust out one of the bricks on top of the carrier beam between the floor joists and run the wire betwen the joists and back to the panel that way. Then patch holes.
Some feel the sheath has to stay on to comply with 300.11 which requires the conductors to be identified.
(2008 NEC)
WHAT is an MWBC? THHN has to be derated also so what is the point of using it in this situation?
The circuits are all to dedicated receptacles for a/c's. This is an old house, real old. I will just have to cut the ceiling open and run the wires back through the floor joists.