In article ,
Don Murray wrote:

Martin H. Eastburn wrote:

Special angles for smart assess on Tuesdays.
Actually - I'm a Physicist. I know that the center tap is not perfect.
So the end phases are not perfect.
That is the fact of manufacture. My brother makes Utility Transformers.

It's not really a center tap. There's two separate coils on the
secondary and for a 240 transformer the 2 coils are in series, and the
center point is connected to a bushing and brought to the outside of the
can. The same transformer can be used on a 208 service by parallelling
the secondary coils inside the can. Didn't your brother explain this to you?

This is 220 service.

No, it's 240 service.

IT depends on your high line service and if the high line was kicked up
to allow more power or not.

More BS. If you have anything to back this up, show me.

_I_ only have 208V. not 220, or 240. I've got meter readings to back
that claim, *and* utility warning stickers at the meter.

I have lived using 110, 112, 115, 120, 125, 130 volts on home wall plugs.

More BS. Granted years ago there was 110, and now the service voltage is
120 plus or minus 5%. But nowhere in the United States has 130V in wall
plugs. If they do show me.

You had better not bet money against that 130v. I used to have a calibrated
westinghouse line-voltage monitor that I used wherever I was living.

In one old apartment building (1905 construction) I lived in -- which was less
than 70 ft from the substation -- I had a measured 129.5V on the third floor.

Took some _quite_ fussing at the electric utility to get them to send somebody
out to check the situation. When the _engineer_ finally showed up, he took
one look at the gear sitting on my 'workbench', said "h*ll, you've got better
test gear than I do", and radioed dispatch to roll a service truck to the
substation 'right now'.