Re: Safety Gap, Grounding, and Secondary Questions

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

Original poster: "Gregory Hunter by way of Terry Fritz <twftesla-at-qwest-dot-net>" <ghunter31014-at-yahoo-dot-com>

Hi Jake,

--- Tesla list <tesla-at-pupman-dot-com> wrote:
> Original poster: "Jake Draper by way of Terry Fritz
> <twftesla-at-qwest-dot-net>" <cybermecium2-at-home-dot-com>
> 
> Hi, I was running my 3"x12" coil tonight and it
> occurred to me that I didn't
> have any safety gaps on my prized 15/60
> Franceformer. So I made some safety
> gaps to ground. So I have 2 questions about
> grounding NSTs:
>  
> 1) Do you connect the ground screw on the NST to the
> earth ground in your home
> (3rd prong)

Yes, connect the ground screw to the earth ground.

> 2) If the NST is not grounded, will a firing safety
> gap kill it because it just
> shorts the overvoltage     through its own winding?

No, this is not especially harmful. When the safety
gaps fire, they will clamp the voltage to zero for an
instant, whether the ground lug is earthed or not. But
earth the ground lug on your NST anyway.

>  
> NOTE: As of now, my NST has the ground screw
> connected to the 3rd prong in the
> recepticle.

Good!

>  
> I also have a question about my secondary, When I
> was running it, I noticed
> some tiny pin-prick sparks on the secondary so I put
> some glue over it as extra
> insulation. Will this kill my secondary or is it
> something that happens alot?

This isn't good. No saprks should be coming from the
windings on the secondary. This is usually a symptom
of over coupling. You can cure it by elevating the
seconday a little--perhaps an inch at a time until the
spurious sparks quit.

>     -Jake D.
>    
> <mailto:cybermecium2-at-home-dot-com>cybermecium2-at-home-dot-com
>     http://taradev.cjb-dot-net
>  
>  
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Regards,

Greg
http://hot-streamer-dot-com/greg
 


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