Lord Garth wrote:

"Joerg" wrote in message
et...

BTW your newsreader sometimes drops groups from the follow-up.



I cutting them out Joerg...I also jump into the middle at times.

Re the voltage, to get 120 volts from a center tapped transformer,
on one phase, each of the three phases would need to be 240 volts.
It would seem to be available but at what cost?


In the US it is not very common to have three-phase available at the end
user. Part of our community does have a three-phase distribution at the
kilovolt level. Then they hang each transformer between two of the
phases. Pretty much in a statistical or round-robin scheme to provide a
somewhat equal load. The transformer secondary is a center tapped
120V+120V and typically feeds 3-5 houses.

Industry sometimes uses three-phase but I remember a case where a
business wanted to get that and the CEO almost fell off his chair when
he received the quote from the utility. Then they opted to buy the
diesel generators they had rented as a temporary power source. This is
what you get with monopoly situations I guess.

--
Regards, Joerg

http://www.analogconsultants.com