Re: Grounding in the desert
From: Robert W. Stephens[SMTP:rwstephens-at-headwaters-dot-com]
Reply To: rwstephens-at-headwaters-dot-com
Sent: Thursday, July 24, 1997 9:33 PM
To: Tesla List
Subject: Re: Grounding in the desert
> From: Brandon Doughan[SMTP:fiveht-at-well-dot-com]
> Reply To: Brandon Doughan
> Sent: Monday, July 21, 1997 10:28 AM
> To: tesla
> Subject: Grounding in the desert
> Hey you HV freaks-
> Well, The High Voltage Camp is shaping up for burningman next
> month. (What is Burningman?? www.burningman-dot-com) So far, Ive wrapped
> an 11" X 40" coilform with 10 gauge (yes, that's 10 gauge...) enamaled
> Cu, have a few torrids made and am finishing up the base. Being in a
> small apartment in San Francisco, I've no opportunity to test run it.
> This leads me to a few questions for you all:
> If you don't know, the Buringman event takes place on a playa, an
> ancient dried lake bed that stretches for miles and is almost perfectly
> flat. I'm worried about grounding out there. My plan is to take the
> bottom lead of my secondary to a piece of rebar that I've dug down and
> pounded in as far as I can. I also plan to soak the area with salt water.
> Think that will be good enough? I also plan to have a second grounding
> rod for the center tap of the NST and casing of the gas-powered generator
> Im planning on luggin out there. Thoughts? **I'm also worried theres a
> chance the metal stakes that the thousands of other people will also be
> pounding into the ground for their tents and camps could somehow draw
> some current** Thinks there's any chance of that? I remember Tesla
> mentioning being able to draw sparks off of water pipes miles away. I
> certainly do not want to injury someone 100 yards away.
> Second question: Im not familiar with portable generators. How
> big of one do I want? I'm using a 12KV NST having 60ma through a 1/4" Cu
> tubing flat spiral primary.
> Thanks for any help! Brandon
I have a portable coil that puts out in the 40-50 inch range from a 15
kV -at- 60 mA neon transformer. I've run it successfully outdoors off a
portable 1400 watt Honda generator (115 v-at- 60 Hz) and have used the
metal body of a pickup truck as a ground (counterpoise). Forget
about driving a rod into the desert, just connect to your vehicle's
chassis with fifteen to twenty feet of #10 or heavier copper wire.