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Re: A picture is worth 3 words... said by nunya:To answer your question and a few others:
The biggest issue is de-rating. These are all power circuits.
The circuits would all have to be derated 45%.
Judging from the neutral count, it appears something went horribly awry as well.
All mwbc's must be grouped and properly identified.
Ordinarily there would be several smaller conduits leaving the panel; rather than 1 giant conduit.
The other conduits you see are from the vanilla box (lights, sidewall outlets, HW, emergency lighting, 1 HVAC RTU.
While there is no "set" color code, when established it should be followed. The feeder coming in is tagged out properly ABC Black Red Blue. (This is a common 120/208 3 phase service)
Finally, poor workmanship in and of itself is a code violation. When all else fails 110.12.
Thanks. WI did not require derating until some time after 2002, I think. I've got a couple of conduits with multiple MWBCs but they are grouped ... which is also why I have both white and gray for the grounded.
At one place where I lived in the 90s, they ran all the NM-B through a single 1-1/2 or 2" conduit stubbed out of the top of the load center.
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 nunyaWho is John Galt?Premium,MVM
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| De-rating isn't anything new. It doesn't matter what state you are in, the laws of physics still apply. I think it's safe to say that it's been a code requirement for a long time. I would guess over 100 years.
FWIW, going back to 1962 (the earliest I could find) it looks like WI just takes the NEC and adds their own little pre-cursor to the front with some minor amendments.
Basically, it's called the the WI electrical code, but it's really just the same NEC that almost everywhere USA uses.
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Reviews:
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| said by nunya:De-rating isn't anything new. It doesn't matter what state you are in, the laws of physics still apply. I think it's safe to say that it's been a code requirement for a long time. I would guess over 100 years.
FWIW, going back to 1962 (the earliest I could find) it looks like WI just takes the NEC and adds their own little pre-cursor to the front with some minor amendments.
Basically, it's called the the WI electrical code, but it's really just the same NEC that almost everywhere USA uses.
I should know by now that if I don't properly qualify and source my statements in this forum they will be refuted and rejected. 
You are right of course that derating has been around since the beginning of time. I was referring to a specific provision Wisconsin had (Comm 16.30) in 1999 which is what was relevant to my situation.
quote:
ARTICLE 310
CONDUCTORS FOR GENERAL WIRING
Comm 16.30 Ampacities for conductors rated
0-2000 volts [NEC 310-15].
(1) ADJUSTMENT FACTORS [NEC 310-15(b)(2)]. This is a department exception in addition to the exceptions specified in NEC 310-15(b)(2)(a):
Exception No. 5: The derating factors shown above do not apply
to branch circuits supplying an individual dwelling unit.
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