On Sunday, November 17, 2013 11:57:03 AM UTC-5, wrote:


Ah, an appeal to "authority". You're wrong, Trader. The two

(180degrees out of phase, and inversion) may look the same but they

most certainly aren't,



And again no explanation to support the claim at all.




If you were in school and they hooked an oscilloscope with

two inputs up to:





Dryer hot 1 and neutral

Dryer hot 2 and neutral



and showed you those waveforms, only calling them waveform A

and B and asked what the phase relationship was between them,

what would your answer be?



They are opposite.

What a joke. So, if they differed by 170 degrees, or 190 degrees,
what would the relationship be then? Almost opposite?
You can't get it in your head that 180 deg phase difference
is just one special case
of a relationship of waveforms. How specifically they are generated
matters not a wit. And for the record, saying they differ by 180 degrees
is what one would expect from even a high school math student as
opposed to the imprecise "opposite".


Here is an app note from an electical eqpt manufacturer that
explains 240/120V split-phase:

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

"The two legs, represented by Phase A and Phase B, are
180 degrees apart." Since they are 180 deg apart, wiring
them together with their relative polarities will result in....
240V"


Notice that they acknowledge:

There are two phases, A and B.
They differ by 180 deg in phase.

QED.