ECN Forum Forums Code Related Discussion NEC & other Code issues 480 vac Conduit

I love that response! Well stated for sure.

I completely missed the OP's intent here. I thought we were speaking of field-installed material where the NEC would likely be the most likely code being referenced. True, if it is a skid-mounted or portable assembly, just like a manufactured home, the rules change dramatically.

Actually this is sanitary tube that is argon purge welded. The inside of the pipe is not how you described. The seam on the inside has less than an 1/8" "smooth" seam. As I stated the welds are performed by the same crew that is welding the pipes for the rest of the aseptic or sanitary food/beverage process process.

As for the skids, unfortunately even though they are simular none of them are exactly the same so I do not think that we could have them listed.

I agree this is special welding, not what
I see.

Perhaps you could get closer to the letter of the code of you pulled a cable through the pipe? I am starting to believe I would 90-4 you with THHN if you could show me the inside of some of your welds. A guy can screw up the deburring process with EMT and I just cut my finger yesterday on a rigid coupler. At a certain point we just have to ask ourselves "is this really safe?"