RE: IS 240VAC two-phase - NO

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

Original poster: "David Trimmell" <humanb-at-chaoticuniverse-dot-com> 

I thought Dan and others described it well, but here goes:

I take a 120V house lead (newt + AC 120V) plug it into my vary nice
transformer with two primaries and two secondaries. I can get 3600V out
between each secondary to ground (neutral), But I can also get 7200V
between the secondaries! This is just as Dan and others have described.
Residential service in the US IS SPLIT 240V lines! This is pretty basic!
Just think about magnets!

David Trimmell

-----Original Message-----
From: Tesla list [mailto:tesla-at-pupman-dot-com]
Sent: Tuesday, January 06, 2004 5:03 PM
To: tesla-at-pupman-dot-com
Subject: Re: IS 240VAC two-phase - NO

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