Re: Safety--NFPA70E and Flashover Clearance Info

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

Original poster: Kurt Schraner <k.schraner-at-datacomm.ch> 

Hi all,

I went a different way to the chickenwire/faraday shielding system. It 
consists of a screen of insulating sheet, mounted some inches below the 
ceiling, and can be seen under:

http://home.datacomm.ch/k.schraner/hv_screen.htm

I had much better success with this simple solution, than my coiler buddy 
Andy with a wire mesh: the mesh was attracting sparks by the capacitance 
provided, and occasionally the sparks "ignored" the coarse mesh, hitting 
the ceiling anyway, wheras my insulating sheet screen "discouraged" the 
spark formation efficiently.

Kurt

Tesla list schrieb:
>Original poster: "Steve Conner" <steve.conner-at-optosci-dot-com>
>  >While tuning, I went
>  >from no output to tremendous output, with streamers longer than expected,
>  >and therefore hitting the Romex in the ceiling.  I didn't expect this.  If
>I
>  >run chicken wire on the ceiling, and ground it out, will this be enough to
>  >keep things safe?
>Streamers hitting your house wiring doesn't sound very safe, especially if
>they make the lights come on, like you mentioned 8-0 The lights could be lit
>by the TC energy directly, or it could be starting an arc inside the light
>switch that is letting some power through from the 120V line. Either way not
>good :(
>Grounded chicken wire would probably solve the problem, but you need to
>think for a while about what you're going to ground it to... The ideal is a
>"Faraday cage"- chicken wire on all your walls, ceiling, and floor, grounded
>to the same ground as your secondary base.
>I have only hit wires in my ceiling once or twice briefly, and the lights
>never lit up :(
>http://www.scopeboy-dot-com/tesla/fryingtonight3.jpg
>Steve C.