Re: Ground box

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

Original poster: "Malcolm Watts by way of Terry Fritz <twftesla-at-uswest-dot-net>" <m.j.watts-at-massey.ac.nz>

Hi Terry,
           If the outer is braided, it will be probably the worst 
ground conductor you can get.

Cheers,
Malcolm

On 5 Apr 01, at 15:59, Tesla list wrote:

> Original poster: "Terry Fritz" <twftesla-at-uswest-dot-net>
> 
> Hi All,
> 
> I have been using the following ground system:
> 
> http://hot-streamer-dot-com/TeslaCoils/Misc/GroundBox/Diagram.jpg
> 
> It is basically a length (40 feet) of RG-8U coaxial cable.  One side
> has both the inner conductor and shield connected together to a cold
> water pipe.
> 
> http://hot-streamer-dot-com/TeslaCoils/Misc/GroundBox/PipeConnection.jpg
> 
> The other end has the shield connected to a metal box and the inner
> conductor connected to a terminal.
> 
> http://hot-streamer-dot-com/TeslaCoils/Misc/GroundBox/InsideBox.jpg
> 
> http://hot-streamer-dot-com/TeslaCoils/Misc/GroundBox/TerminalBox.jpg
> 
> The idea is that safety and general grounds can be connected to the
> box/cable shield while the noisy secondary ground connection can
> connect to the terminal.  Thus, the base ground lead currents will be
> somewhat shielded buy the outer conductor.  The other general
> grounding is through the shield.  I measure 0.2 ohms between the
> ground box and the AC line ground at my control box.
> 
> I know this subject came up last month and I was wondering if this is
> seems like a good idea or not.
> 
> Comment/thoughts/suggestions...
> 
> Cheers,
> 
>  Terry
> 
> 
>