RE: Single vs Two Phase (was - Spark gap erosion resistance)

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Wall Richard Wayne by way of Terry Fritz <twftesla-at-qwest-dot-net>" <rwall-at-ix-dot-netcom-dot-com>

John.
 
Sorry, but standard 220 vac comes in both two and three phases from the
electrical utilities.  The two phase system is 180 degrees apart and three
phase of course is 120 degrees apart in phase.  
 
RWW
>
> Terry -
>  
> I think you will find that your electric utility would consider yours as a
> 120/240 volt single phase system. A two phase system has the phases at 90
> degrees not 180. A two phase motor would be self starting without the
> additional help a single phase motor requires. There are no utilities using
> the two phase system anymore.
>  
> John Couture