Was in a school classroom watersource heat pumps. Labeled 265V. That's on a single breaker and 265V. to ground. small 1 ton sys. Never seen this set-up. Any comments?
In GOD We Trust
yes i was looking for a 120v off a light in a walk in cooler, a few weeks back , luckily i checked before connecting 270v there
277 is one leg of 480 to ground.
Its also quite the shocker to your body to ground.
UA Local 32 retired as of Jan 2020
Just one leg of 480v. Very common in large commercial buildings as lighting
UA Proud
"Phfft! Facts. You can use them to prove anything." Homer Simpson
This is 265 v Equipment (small watersource heat pumps) nameplated for 265v. Tecumseh hermitec labeled 265v. blower motor also.
In GOD We Trust
http://forums.mikeholt.com/showthread.php?t=136840
Here's a little info.
The great professors of the art are not immune from the malignancy of matter and the eternal cussedness of inanimate objects.
Iirc a 265v appliance will work with 277. I think it's made for Europe or something where their service is 265/480? (Maybe I dreamt that though).
I'm sure Timebuilder knows enough about it to make your head spin.
You have utility supply voltages of 120, 208, 240, 277, 480, then there are the rated voltages of 115, 200, 230, 265, 460, that are used for motors & welding equipment, in the 50 hertz world they use 380Y/220V, 400Y/230V, 415Y/240V, because of some countries using 380/220V, & others 415/240V, the EU harmonized it to 400/230V, quite common in Germany to use 400V 3Ø for a domestic electric range, 277 volts is pretty much a American voltage, Canada uses 600Y/347V, 277V & 347V are both line to neutral voltages, so single pole breakers would be used in a panel.
PTAC's are available with 265V