Well it does depend on your Xfmr configuration, but your most common set up is a delta 240/120 which gives you a 208V to ground on your high leg which should be your B phase in your panel (and tagged orange). The C xfmr is center tapped and carries all of your 120V loads. In an industrial application where no 120V leg is needed the set up will be different.
[This message has been edited by arseegee (edited 06-07-2002).]
