Re: 1156 1256 variac question

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "David Rieben" <drieben@xxxxxxxxxxxxxxx>

Steve, Kevin,

Yes, I stand corrected. I have done this very thing before with
(2) 120 volt variacs, but to explain it in writing proved a bit
challenging to me ;^/  Steve is correct, you do take the 0 -
240/280 volt output off of the 2 wipers. You would series
the input to the 2 seriesed variacs by hooking each of the
"hots" from the 240 volt service to the hot input of each
variac and tying the 2 "commons" in series. I "think" THAT's
correct ;^} You do NOT ground the center nuetral between
the 2 variacs, either!

David Rieben

----- Original Message ----- From: "Tesla list" <tesla@xxxxxxxxxx>
To: <tesla@xxxxxxxxxx>
Sent: Saturday, April 29, 2006 11:20 PM
Subject: Re: 1156 1256 variac question


> Original poster: "S&JY" <youngsters@xxxxxxxxxxxxxxx>
>
> Kevin,
>
> I run two 120 volt ganged variacs.  They are fed by a USA standard 240 volt
> circuit (120-neutral-120 volt).  One variac connects between one of the 120
> volt feeds and neutral.  The other one connects to the other 120 volt feed
> and neutral.  You can get 0 to 240 volts between the two wipers.
>
> (David Rieben gave another response, but I don't see how his scheme could
> work.  Depending on which wiper to common you pick, you will end up with 0
> to 120 out, or 120 to 240 out, but not 0 to 240.)
>
> --Steve Y.
>
>
> ----- Original Message -----
> From: "Tesla list" <tesla@xxxxxxxxxx>
> To: <tesla@xxxxxxxxxx>
> Sent: Saturday, April 29, 2006 4:55 PM
> Subject: 1156 1256 variac question
>
>
> > Original poster: makinglightning@xxxxxxxxxxx
> >
> >
> > I have 2 - 1156 variacs.
> >
> > Is there a way I can wire them so I can use them as one 240 v input
> variac?
> >
> > I believe the 1156's are 120v and the 1256's 240v
> >
> > Kevin
> >
> >
> >
> >
> >