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David Nebenzahl David Nebenzahl is offline
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Default 440 volt three phase question

On 5/27/2010 1:03 PM Evan spake thus:

On May 27, 11:03 am, "Stormin Mormon"
wrote:
I've had the moment to work on 440 volt roof top heating and AC.

Once in a while, need some power to run a 120 volt device. Is it 120
volts from one leg to ground?

(Yeah, I could just check it. But I was on the roof yesterday, and not
sure how long until I get to another roof.)


How old is this roof top unit... Seriously 440 volts ? Are you sure
that it isn't 480 volts ?


Right; we should all tighten up our terminology, nominal voltage-wise.

It's 120, 240 and 480. *Not* 110, 220 and 440. (Not to mention all those
weird older numbers that were used, like 117 volts: WTF did that come
from???)


--
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with the flaunting of well-defined muscle, wrapped in flags.

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