Re: Using dual 120V for 240?
From: Tesla List <tesla-at-pupman-dot-com>
To: tesla-at-pupman-dot-com <tesla-at-pupman-dot-com>
Date: Sunday, July 04, 1999 11:56 AM
Subject: Using dual 120V for 240?
>Original Poster: "Coiler" <mycroft-at-access1-dot-net>
>I am curious.. is it possible to gang a pair of 120V variacs to
>control 240? I assume they would be wired in series, with the center
>leg shared between, basically, one on each side of the neutral.
>Would this work? and if so, what are the gotchas?
>[I see lots of monster 120V variacs on E-bay, but no 240, so I am
>trying to be inventive here.]
>Coiler, Homebrewer, Nerd. mycroft-at-access1-dot-net
Yes, this works fine.
I purchssed a 120V 3 phase 45 amp variac.
I removed one unit, then wired the two in series. The output is off the two
You do not need to, but may connect the neutral between the two variacs.