Re: HV Cables, Current...

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Harold Weiss" <hweiss-at-new.rr-dot-com> 

Hi Dan,

Why?  I use it only in the tank itself where discharge currents will be
high, and for grounding.  But for the NST connections #14 GTO is all you
would need, as it could handle 15A safely.

With my new controller I have an ammeter and voltmeter on the variac output,
to see how much I am drawing.  The voltmeter works great with 12KV NST's, as
it's an easy conversion to KV.  With 2 12/60's and no PFC, I can draw 18A.
During operation the ammeter does vary quite a bit during the run, with a
lot of spiking when the SRSG is running rough.  The current draw is quite a
bit higher than I expected to see.  This is probably what made me think that
I had a primary short on my old 15" coil, when it would trip 20A breakers
before a spark would even form in the gap.  So my guess is about 9-12A
without PFC.  200uF seems a bit high, as I seem to remember Steve Ward
mentioning 300uf for a 15/120 coil.  Guessing again, with PFC, around 7.5A.

David E Weiss
 > Original poster: Dan <toodamtall1-at-yahoo-dot-com>
 >
 > Hi folks,
 >
 > Is it possible to use #4 fine-strand welding cable
 > from the NSTs to the Tank circuit?
 >
 > Another question to ponder;
 > How much current do you think 2, 15/30s with 200mfd.
 > pfc, will draw, with the typical 4" sec. & tank
 > circuit?
 >
 > My debt of gratitude grows farther still.
 >
 > Dan-Ft. Lauderdale
 >
 > _
 >
 >
 >