See attached pic
Maybe not. A 208V L-L insulation system may not necessarily be adequate for an equal L-N amount (this is the problem of slash rated breakers).
Where are you getting that it is an ATS?
The catalog number ends in ATS. But that could be coincidence.
Yes it's a coincidence. A is the code for tin plated aluminum bus, T is for top feed, S is for surface mounting.
I know Square D will mark custom ordered panel with 208/120. Most panelboards I have purchased were assembled on site with stock items though. Those stock items are labeled 120/240. "Load centers" are also labeled 120/240. 120/240 labeled panels can be used on 208 volt wye systems though.
And FWIW, the topic of 240 vs 208 load centers came up a while back, and I did some digging and could not find an instance of one being rated for one voltage system but not the other. They were all approved for both according to my research.
They are likely built with all the same components, would cost more to stock separate panel bus segments for 208 and 240 when the requirements for them would be so similar. Just the fact it is a factory order they can label it to match the application where stuff made for general stock they are going to label for max volts.
But that would mean that you could only use 2/3 of the breaker spaces, wouldn't it?
I believe so if it is a 240/120 3 phase delta system.
It seems to me that if you were to use a three phase panel on a single phase service, a third of the breaker landing points would be on a dead bus.
It depends on the panel. While losd centers have limited optiond, there are some panels whuch can have their 'breaker to bus' connections moved so the high leg is not available without loosing breaker mounting space.
For I-line panels, single and two pole breakers are available with different phase connections so I don't think you would lose any space.
Not with I-Line series panels. You do have to make sure you order breakers with jaws placed to connect to the two buses you are utilizing though.
