Re: To ground or not to ground?

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "D.C. Cox" <resonance@xxxxxxxxxx>



Be sure the bottom of the sec coil attaches only to the external 
ground rod via a 4-6 AWG fine standed welding cable (RF currents like 
the fine multiple conductors).  Use a standard 6-8 ft copper ground 
rod and drive it in for 2-3 ft.  Then, pull it out of the hole a dump 
a tablespoon of common table salt down the hole.  Put it back in the 
hole and then drive it all the way in.  The salt dispurses and helps 
to expand the actual ground area via ion migration.

Also make up a hash filter --- 2 inch ID shedule 40 PVC water pipe x 
18 inches long closewound with #12 AWG house wiring.  Fill the tubes 
with 1/8th inch steel rods and epoxy or silicone into place.  Leave 
extra 1 inch each end for mounting off the case with short plastic 
rod (20 inch overall).

Dr. Resonance



> Original poster: "Dirk Stubbs" <dirk@xxxxxxxxxxxxxx>
>
> I have a question regarding grounding of my TC components.  I am 
> wiring up my power supply box which contains a variac, emi filter, 
> and overcurrent protection. It will supply power to my NST and spark 
> gap fan.  Some of the components in the power supply  require a 
> ground such as the  EMI filter(10VR6), MOV's, and even my variac 
> housing(would be nice). What ground do I use in my power supply? My 
> house ground or my RF ground?   I know not to use the house ground 
> for my RF ground. Does this also apply for grounding in my power supply box?
>
> I looked in my NEC under article 250 but found nothing about 
> grounding Tesla Coils or their power supply circuits. ;)
>
> Thanks,
> Dirk