I think wrapping them with metal was an attempt to say they are not in the duct (e.g. the duct is "going around them"). Running any wiring method in a non-return duct is not allowed per 300.22(B) unless it is powering something that needs to be inside that duct.
New HVAC duct vs. existing old rigid conduit
- Thread starter LarryFine
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James L
Senior Member
- Location
- Kansas Cty, Mo, USA
- Occupation
- Electrician
I agree. But there seems to be some concern on Larry's part about them being in the air flow.
synchro
Senior Member
- Location
- Chicago, IL
- Occupation
- EE
Maybe two pieces of sheet metal could be fabricated, placed on both sides of the conduits, and then joined together with folded seams at the front and back to form an elongated diamond shape (rhombus). That should help minimize the air drag, and I think a good argument could be made that the resulting duct assembly would be "going around" the conduits as suemarkp has mentioned. It could be made so that there is no contact with the conduits if that provides a better argument. The diamond shaped sheet metal might be attached to the duct with bent tabs and screws or similar means. The joints could even be caulked with silicone to ensure there's no leakage. I don't think this would be very hard to make by anyone experienced in fabricating duct work, but that's coming from someone without any significant experience in this.
- Location
- Chapel Hill, NC
- Occupation
- Retired Electrical Contractor
If the duct went up to that wall and stopped and continued out the other end of the wall would you find issue with that? Basically you are panning the stud space the distance of the depth of the wall.
LarryFine
Master Electrician Electric Contractor Richmond VA
- Location
- Henrico County, VA
- Occupation
- Electrical Contractor
Not at all, just whether it was wise of me to suggest.I agree. But there seems to be some concern on Larry's part about them being in the air flow.
The HVAC guy agreed to keep the duct vertical from the previous hole and pass to the left.
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