Re: IS 240VAC two-phase - NO

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

Original poster: "Richard W." <potluckutk-at-comcast-dot-net> 

LOL

Interesting.
I don't think 240 is 2 phase.
If I connect a common low voltage transformer to 120vac I get 12.6 volts
out. This is usually center-tapped. So I get two 6.3 volt supplies with a
common, the tap. That doesn't mean I get 2 phase 12.6 volts. :)

Rick W.
Salt Lake


----- Original Message -----
From: Tesla list <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Wednesday, January 07, 2004 7:48 AM
Subject: RE: IS 240VAC two-phase - NO


 > 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
 >
 >