On Saturday, November 16, 2013 6:07:17 PM UTC-5, wrote:
On Sat, 16 Nov 2013 13:51:46 -0600, Nightcrawler®

wrote:





"Tony Hwang" wrote in message news

wrote:

On Sat, 16 Nov 2013 01:17:23 -0500, Wes Groleau

wrote:



On 11-15-2013, 19:58, wrote:

180 degrees, but technically, no. It's opposite sign, not 180 degrees

out of phase.



Same thing



No, it's not. It's one phase.



Hi,

It's called bi-phase. aka Edison circuit.



No, it is single phase, or split phase. Only one phase is

used and is center tapped to split the voltage. It is

impossible for this circuit to be out of phase with itself.



+1


No one is claiming anything is out of phase with itself.
The simple statement was made that one of the hot legs
of a 240V dryer is out of phase with the other by 180 degrees.
Look at them on a scope, what do you see? Phase in this
context is just the relationship of one waveform to another.
Two waveforms can differ in phase from 0 to 360 deg. With a
sine wave, when one differs from the other by 180 deg, they
can also be said to be the opposite of each other.



One leg is the opposite of the other by the very nature of the

transformer.


Correct. And when you have one sine wave that is the opposite
of the other, it's a 180 deg phase difference. Look at it
on a scope or graph it. It doesn't matter how exactly the waveform
difference is generated.