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.)

--
Christopher A. Young
Learn more about Jesus
*www.lds.org
.


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

I asked the _age_ of the unit because there is supposed to be
a service outlet for 120 volt powered tools for maintaining the
roof top equipment installed somewhere near the unit...

And no, with a 3 phase 480 volt system it is typically 277 volts
on each leg...

~~ Evan