NRTL / UL508A Application in Panel that contains Water Piping?

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PL99

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Electrical Engineer
I came across an interesting issue today that I'm hoping for some insight on.

My company is planning on purchasing point of use cooling equipment for a process. I'm not thrilled with the cooling equipment company overall, but they have provided similar equipment to my companies overseas and I'm being forced to use them.

The issue I have is that they are providing these cooling panels that have water piping/valves in one half of the panel, and 120V electrical/control components in the other half. It is a large SS enclosure with a thin SS dividing plate that is caulked around the edges that I expect they think will prevent water ingress in the event of a water line failure. It is not 2 separate enclosures, which is what I wanted.

They are telling me that the controls/120V side is UL508A. I'm wary of this since I don't think this would pass given that anyone with a brain would see that this panel could easily fill with water (very quickly) and submerge live electrical parts. It is possible that they fabricate the backpanel at a UL508A shop and place it into this other enclosure and say it is UL508A (which I don't think they can legally do). I'm sure there are other standards that are in violation here, but I'm not sure what they are.

Anyone here have any insight on this? Am I being too paranoid?
 
Look at label. If it says type 1 enclosure or type 3r it is probably ok. Ul nor any other nrtl cares what might happen. The nec does not care what might happen.

Ul allows a panel w/o enclosure to be listed for being put in another enclosure later.

I don't really see an issue here.
 
I expect they are building the panel elsewhere (probably in an UL shop) and then adding it to this assembly with the piping that has non-ul components in it. I don’t believe you can say that the entire unit is 508 compliant if you throw a divider in the middle and put non-UL components on the other side. If it was 2 separate boxes this would be no issue, but it is a single enclosure.

I’d feel more comfortable if this was certified as an assembly to UL-412 (Standard for Refrigeration Unit Coolers), but my guess is that it wouldn’t pass constructed as-is, which is why I’m getting the “bootleg” 508A to say it is “UL”.

Their documents say panel is “UL 508A compliant” and other strange verbiage that has me concerned. I don’t see a traditional UL nameplate, the box is not officially rated as well since it is a custom fab which is another point of concern.
 
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