[Boatanchors] Basic electricity question

[J. Forster]

It was a typo. I meant single phase. Single phase is also sometimes called 'flat
two phare' BTW (115-0-115)
-J

Chuck McGregor wrote:

> John-
>
> Two-phase is an archaic 4-wire power system which may still be in use in
> some heavy industrial facilities in the northeastern US. The two phases are
> 90 degrees phase shifted from each other.  I doubt that any new two-phase
> systems have been installed during our lifetimes.
>
> The common US domestic wiring system is correctly called a 120/240v Single
> Phase system.
>
> 73,
> Chuck N7RHU
>
> At 03:59 PM 1/13/2005, J. Forster wrote:
>
> >Simply put, the ground is a protective conductor. Akin to the case of a
> >breaker
> >box. It's typically connected to physical ground or a water pipe, depending on
> >code.
> >
> >In two phase circuits (as used in domestic situations) the line is like
> >the plus
> >and is hot to ground.
> >
> >The neutral is the return like the minus and is usually near ground.
> >Neutral and
> >Ground are connected at some point.
> >
> >If the line voltage is observed with respect to neutral on a scope, it
> >will be a
> >sine wave. If you have a multi-trace scope, and put the other channels on the
> >other lines in a three phase circuit, you will see three sine waves, 120
> >degrees
> >shifted in phase between them.
> >
> >That's roughly it.
> >-John
> >
> >William L Howard wrote:
> >
> > > BA's and 3-wire cords
> > >
> > > For those of us who are not electricians, would somebody please explain
> > > two phase versus three phase current and also what is meant by neutral
> > > lead, and ground? If it were DC it would be positive + and negative -
> > > but with AC it alternates.
> > >
> > > Simple explanations appreciated.
> > >
> > > Thanks,
> > >
> > > Bill Howard
> > >
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