On Sat, 16 Nov 2013 15:09:54 -0600, Mark Lloyd
wrote:

On 11/16/2013 11:09 AM, wrote:
On Sat, 16 Nov 2013 09:54:39 -0700, Tony Hwang
wrote:

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.

Wrong. It's called "split-phase". ...because that's *exactly* what
it is.

"phase" has a meaning. There's still 2 of them. "split-phase" sounds
right too.

Two-phase is something entirely different (and quite rare).


I think I've heard about that. Are the phases 90 degrees apart?

Yes. From it, any variation or number of phases can be easily
generated (efficiently). It's just a little trig and a transformer.

The fact that there is this different 2 phase system doesn't prevent the
usual one from being 2 phase. That's be like saying you don't have 2
colors of holiday lights if they're just red and green.

Words mean things. The proper term for the Edison connection is
"split-phase". It *is* a single phase that is split by a
center-tapped transformer (center grounded).