I'm confused...

So... 310.15(b)(6) can be used for commercial if the PoCo has undersized their conductors? Where does it say that?

I'm so lost...

Cu Thhn is out of the question... Did I mention 3 LB's?
Maybe my technique is bad, but I can't pull 3/0 Cu Thhn through the bend of an LB in sub-freezing weather without some major help... Three strong men and a hammer... (poor conductors)

I guess I'm just lazy...

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It's all moot, they'll pass it anyway, and I'll be thought a fool by everyone I work with if I change it...

-Virgil
Residential/Commercial Inspector
5 Star Inspections
Member IAEI