See: http://www.3phasepower.org/3phasewiring.htm
-----Original Message----- From: Joe Greco [mailto:jgr...@ns.sol.net] Sent: Tuesday, May 26, 2009 8:20 PM To: Chris Adams Cc: nanog@nanog.org Subject: Re: Why choose 120 volts? > Once upon a time, Joe Greco <jgr...@ns.sol.net> said: > > And I don't like not having anywhere to plug in my power screwdriver's > > recharger... I suppose I should see if I can find someplace that has > > a transformer of an appropriate size, or does anyone already have the > > part number for something that can provide a few hunderd milliamps of > > 120V from 208? :-) > > Isn't 208V usually provided as a connection across two phases of a 3 > phase circuit? In that case, you get 120V by going between one phase > and neutral (no transformer required). Yes, but this doesn't imply that you have access to those other phases. It is easy enough to be delivered 208V single phase service in a data center environment. ... JG -- Joe Greco - sol.net Network Services - Milwaukee, WI - http://www.sol.net "We call it the 'one bite at the apple' rule. Give me one chance [and] then I won't contact you again." - Direct Marketing Ass'n position on e-mail spam(CNN) With 24 million small businesses in the US alone, that's way too many apples.