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You can still get a delta service. The more common reason buildings end up with a delta is utility being cheap, open delta can me made with 2 legs of primary, where wye needs all 3 legs.

Its just a rating, Alot of motors are rated at 440 or 460 to account for service fluctuations. One plant I worked at ran at 500v during the day and 450 at night, this was because they were at the end of the feeder loop and when people were getting home the draw would be higher.

On top of that, most 480 loads will run on 460, they just draw a bit more current. Sent from my SM-G973U using Tapatalk

If youre trying to hit 480 line to line then the lone to ground should be 277. So 265/460 is fairly close Sent from my SM-G973U using Tapatalk

In a nutshell yes Outside the shell most residential is 120/240. Which is 180 degrees out of phase. There is 3 phase 240 (3rd leg is typically 208 to ground) these are either open or closed delta. Theres 3 phase 208 which is 120 degrees out of phase. This gets you 120 to ground and 208 phase to...

Reason for my question is from another person that was running a mill so single application. In your case you're using these for water/ wastewater power. So personal opinion would be a boost transformer. Sent from my SM-G973U using Tapatalk

Thats a good possibility, though the size you may need may make the boost a better fit. Out of curiosity what are you running that needs 480? Most motors can be retapped to a lower voltage. Sent from my SM-G973U using Tapatalk

Buck boost transformer Sent from my SM-G973U using Tapatalk