On Monday, August 6, 2018 at 11:22:54 PM UTC-4, wrote:
On Mon, 6 Aug 2018 17:40:37 -0700 (PDT), trader_4
wrote:

I went through that with Fretwell already. Look, I was accused of doing
a "parlor trick" with a scope. What did I do? I connected the scope
ground to the SYSTEM neutral.

I have explained several times, attaching a scope to a center tap will
make that scope lie to you.

Scopes don't lie. And it's not some parlor trick point that you connect
the scope to. It's the SYSTEM neutral/reference point. And of course
when you do that, you see TWO 120V voltage sources, one 180 deg out of
phase from the other. It's the essence of why the system was created
that way. I've asked many times now, if you disagree that there are in
fact two 120V voltage sources, coming from the two halves of the secondary,
to draw your simple circuit model that shows it fifferently. I've given
you the two voltage source model. The IEEE Fellow, elec engineering
professor gave the same model. This is very basic, first day of circuits
101 stuff.





I gave you the example of ANY delta.
You corrected me that you can buy a scope with a floating common. OK
put that on L1 and tell me what you see.
http://gfretwell.com/electrical/End%...nter%20tap.jpg
and you will see this
http://gfretwell.com/electrical/sine...0secondary.jpg

How many phases do you see? I only see one.
Is there any angle shift in that secondary? I don't see any.
A generator would act the same way.
Your "2 supply" thing is just an illusion caused by looking at a
system from the middle.

Show us how you model and analyze that circuit going into the house
without TWO 120V voltage sources, one 180 out of phase with the other
with respect to the neutral or of opposite polarity, same thing.
And you'd have exactly the same thing if you took a two phase 90 deg
generator and rotated one winding to 180. Which of course is why
you bail out and won't answer those simple questions and instead
start talking about transformers.





I understand people have come up with all sorts of things to try to
rationalize what they see with their meter or a scope but it is really
pretty simple if you understand power systems.

Yes, it is. You have two 120V voltage sources going into the house,
one 180 deg out of phase from the other. Look up the definition of
phase.




I still wonder why you persist with your paralleling bull****. Draw
that out and you will see you are simply connecting L1 to L2 and you
don't need to do anything with the white wire at all. You can leave it
disconnect on both circuits and you still get a bolted fault.

Because one can parallel any two conductors that are in phase and of the
same voltage, that's why. Can you parallel the two 120V hots you see
in the house?