Us versus German power (was once Re: [rescue] argh, what did I do? (Onyx))
David L Kindred (Dave)
d.kindred at telesciences.com
Wed Jan 15 15:46:24 CST 2003
>>>>> "James" == James Lockwood <james at foonly.com> writes:
James> On Wed, 15 Jan 2003, Jochen Kunz wrote:
>> Is three phase power really that uncommon in the USA??? In good
>> old Germany we have 230 V @ 16 A three phase ...
James> For businesses, especially in industrial areas, it's
James> reasonably easy to get. ...
James> Usual residential power distribution in the USA is
James> center-tapped 240V 1ph. ...
James> Usual 3-phase distribution is either 120V/208V Wye (120V from
James> each phase to neutral, 208V phase to phase) or 240V delta
James> (240V phase to phase). ...
The only other big difference between "us" and "them" is the 60Hz versus
50 Hz one (well I guess there is that whole "plug" issue).
There really needs be a good public FAQ on this stuff. Even as the son
of an electrician and having had some EE courses I still get confused on
the 110/115/120 notation and all of the various delta/wye choices. In
moving from building to building for work I've seen where some had 208
and/or 220/240 while others had 440 but not 208 and other combinations.
Annoying when you find you need to buy an extra transformer just to move
a piece of equipment.
David L. Kindred <mailto:d.kindred at telesciences.com>
Unix Systems & Network Administrator
Telesciences, Inc. <http://www.telesciences.com>
2000 Midlantic Drive, Suite 410, Mt. Laurel, NJ 08054
Tel: +1.856.866.1000 ext. 4184
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