Wiring inside of a RTU.

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To me if you came into a factory provided KO you are fine. They are intended to be wired that way. Usually any metal partition you have to pass through has a bushing or a rolled over edge just for that reason
 
So I'm going to ask a few stupid questions here, not familiar with these units but it might get to the mindset of the GC.
First glaring question from picture is related to the wiring to the handibox holding the GFCI receptacle. What is the GFCI used for? Is there a bushing protecting the conductors entering the handibox? Why is the conductors not protected (covered) all the way to the handibox? Is the receptacle for a motor disconnect (like a residential furnace) or is it the convenience receptacle?
If it is the convenience receptacle why is it inside the unit enclosure that requires opening the unit and giving access to exposed live conductors to get to it? Is Convenience receptacle a "non powered" optional outlet? That is what it looks like (based on label and conductors). If so the exposed conductors would still be energized when opening unit for service even though power for the rtu was shut off. Conductors not secured in a fashion to prevent damage, and to prevent incentendtially pulling or yanking the live conductors from the handibox.
Was handibox added by you or by mfg in that location? Every unit I've searched that had a factory convenience receptacle it was faced to the outside of unit, no panel need be removed to access it. Wiring was also totally seperate from the units service wireing, thus the extra KO on base plate where the conductors are entering. Carrier shows the rtu wiring, t-stat control wiring, and the 120v convenience receptacle wireing entering the unit thru seperate KO's just like the picture you had give the showed 3 KO's provided, but you used only 1 pulling all though that.
Again just asking the stupid questions.
 
@Fred B
Even if the OP can argue that the t-stat wires and the RTU power are functioinally related, the does not apply to the convenience receptacle. Another part of non-answer to non-stupid question. :)
 
Not providing an opinion, but the OP seemed to be asking about the GFCI, not the part passing thru the upper left grommet. If the handy-box was not part of the RTU, then I think I can see his point that this is field wiring that should follow the NEC.
 
busman said:
Not providing an opinion, but the OP seemed to be asking about the GFCI, not the part passing thru the upper left grommet. If the handy-box was not part of the RTU, then I think I can see his point that this is field wiring that should follow the NEC.
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What NEC section would you cite as a violation?
 
My only concern would be in line with Post #15 as to whether that is a air plenum space.
 
If this is a plenum space then why are there KO's and grommets for the entry of the conductors?
 
infinity said:
If this is a plenum space then why are there KO's and grommets for the entry of the conductors?
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True. I was thinking flex might be allowed vs open wiring but in reviewing 300,22 I was mistaken.
 
As long as all the wires have the same V rating, you should be fine. No control wiring from the looks of it.

Edited to add:

I bet there is a hazardous voltage label on the cover to the area. Which means......That is what the area was designed for.
 
I see what appears to be a factory label above the receptacle was this factory installed and ready for field wiring?
 
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