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Joined: Aug 2008
Posts: 10
OP
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Currently we use stainless steel welded processing pipe on our skids for low voltage and ss rigid electrical conduit for the 480 going to local pump motors.
Would it meet nec if we run the 480 for the local pump motors in their own welded stainless steel process pipe?
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Joined: Jan 2004
Posts: 1,507
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If I am correct the NEC requires raceways to be "Listed". This may or may not put a crimp in your plans.
George Little
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Joined: Jul 2007
Posts: 1,335
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"Live Awesome!" - Kevin Carosa
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Joined: Jul 2007
Posts: 1,335
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Just saw this was your first post. Welcome aboard. I had a thought. What are you actually building? It may have bearing on your post.
Last edited by sparkyinak; 08/07/08 06:18 PM.
"Live Awesome!" - Kevin Carosa
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Joined: Oct 2006
Posts: 745
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Process pipe conforms to many plumbing codes, but not the NEC for use as conduit. My answer would be no, even though it is probably better than any other type of "listed" conduit.
---Ed---
"But the guy at Home Depot said it would work."
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Joined: Aug 2008
Posts: 10
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Thanks for the prompt responces.
These are food and beverage processing skids.
I was afraid that it was the UL that would be the deciding factor. So our only other option would be to weld ss rigid conduit which would look like garbage.
So does that mean that our low voltage in process pipe connecting to ss nema 4x boxes is out of code?
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Joined: Jul 2004
Posts: 9,826 Likes: 22
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I doubt you can weld any raceway. How would you guarantee there was no slag or rough edges inside?
Greg Fretwell
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Joined: Jul 2004
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Welding conduit is prohibited by NEC section 300.18: (B) Welding. Metal raceways shall not be supported, ter-
minated, or connected by welding to the raceway unless
specifically designed to be or otherwise specifically permit-
ted to be in this Code.
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Joined: Aug 2008
Posts: 10
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How are the dairies getting away with this. A good number of them only except welded conduits?
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Joined: Jul 2004
Posts: 9,826 Likes: 22
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Greg Fretwell
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Posts: 8,443
Joined: July 2002
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