On Fri, 8 Jul 2016 10:58:44 -0400
David Boyle <twoten@xxxxxxxxx> wrote:
> How do I connect the core grounds of my nsts when running at 220?
> Right now they are connected together to supply ground which is kept
> separate from the coil;s earth ground which is a metal spike or a
> water pipe that goes underground.
I would keep it the same.
> And what would be the most sensible
> male plug style to put at the end of my power cord?
A NEMA 6-20 which is a 250V three wire plug would fit a standard 250V T
slot receptacle which is be most likely to be found.
Another option would be to use a NEMA L14 20P which is a 125/250 4 wire
plug commonly found on generators, rarely elsewhere however in my
experience. This will give you two hots, a neutral, and ground. That
would be the best if a suitable receptacle were available.
You would have to take care to keep the phasing correct when connecting
the primaries in series.
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