Re: IS 240VAC two-phase - NO

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

Original poster: BunnyKiller <bunikllr-at-bellsouth-dot-net> 



Tesla list wrote:

>Original poster: dhmccauley-at-spacecatlighting-dot-com
>
>240VAC is correctly denoted as SPLIT single phase.  It is NOT two phase.
>
>It is simply a centertapped, 240VAC single phase line from a single phase
>transformer.
>
>
>Dan
>
>
>
>Two phase denotes a phase angle difference of 180 degrees. The sum of all
>phases in any system must always equal 360 degrees. The standard home
>electrical system in the US is two phase, 180 degree difference( two times
>180 equals 360). Each phase is 125 volts RMS to neutral, and 250 volts RMS
>from phase to phase.
>
>allan
>

weird....

when testing the house wiring with my O-scope ..  the 120V shows a single 
sine wave ...   when testing the 240 system it shows 2 sine waves ( had to 
use both leads)

so how does a single phase get "split" via a center tap transformer to 
produce the opposed phases ???

Scot D