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  1. #1
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    265 V. Whats up with this?

    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

  2. #2
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    Quote Originally Posted by jdwendling View Post
    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?
    277/480 volts is fairly common in commercial/industrial.

  3. #3
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    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

  4. #4
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    277 is one leg of 480 to ground.

  5. #5
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    Its also quite the shocker to your body to ground.
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  6. #6
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    Just one leg of 480v. Very common in large commercial buildings as lighting
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    "Phfft! Facts. You can use them to prove anything." Homer Simpson

  7. #7
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    Thread Starter
    This is 265 v Equipment (small watersource heat pumps) nameplated for 265v. Tecumseh hermitec labeled 265v. blower motor also.
    In GOD We Trust

  8. #8
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  9. #9
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    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.

  10. #10
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    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 3Ψ 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

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