On Wednesday, November 27, 2013 10:12:35 AM UTC-5, Ed wrote:
On 11/27/2013 09:06 AM, TimR wrote:

I asked the question about a multiple tap transformer because I don't understand the details about how a part of a circuit gets "out of phase."





It is not two phase, it is a single phase sin wave.



AC current changes direction 120 times per second.



At any point in time (with exception of crossing 0), the electricity is either flowing



from L1 thru the neutral to L2



or



from L2 thru the neutral to L1

Tell that to the IEEE power engineers:

http://ieeexplore.ieee.org/xpl/artic...number=4520128

"Distribution engineers have treated the standard "singlephase" distribution transformer connection as single phase because from the primary side of the transformer these connections are single phase and in the case of standard rural distribution single phase line to ground. However, with the advent of detailed circuit modeling we are beginning to see distribution modeling and analysis being accomplished past the transformer to the secondary. Which now brings into focus the reality that standard 120/240 secondary systems are not single phase line to ground systems, instead they are three wire systems with two phases and one ground wires. Further, the standard 120/240 secondary is different from the two phase primary system in that the secondary phases are separated by 180 degrees instead of three phases separated by 120 degrees. "

Or these electrical eqpt manufacturers:

http://www.behlman.com/applications/AC%20basics.pdf

http://www.samlexamerica.com/support...Circuit s.pdf

I've asked 12 times now for those of you who claim you can't view
split-phase as having two phases present to give your definition of
"phase". It's pointless to claim anything when you can't define a
simple engineering term.

Also see the other thread I started where I start out with 3 phase
and morph it into 2 phases, indistinguishable fromm what you have in
a 240/120V split phase service.