Re: grounding miscellaneous stuff (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

---------- Forwarded message ----------
Date: Tue, 26 Jun 2007 16:40:03 -0700
From: Barton B. Anderson <bartb@xxxxxxxxxxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: Re: grounding miscellaneous stuff (fwd)

Hi David,

When I started the 1 ear at RF ground connection, periodically I would 
get a good shock at the case. At some point, I just decided to end mains 
at the case and haven't been shocked since, so there I've stayed. With 
one of the horns at RF ground, I don't want a potential difference issue 
between RF ground and mains ground inside the pig which is what I 
thought was happening (could have been simply me [but lets not go down 
that thread]). That was my reasoning at the time. The pig doesn't seem 
to mind. I probably should retest that situation a little better through 
measurement.

I agree that keeping the pig case at mains is the safest connection. It 
may have been my RF ground (poor grounding) that may be part of why. I 
should also measure that. It's pretty dry where my RF ground is located 
(it's covered in a big slab of cement). See, now you got me thinking 
about it (way to go!). I'm probably going to be drilling a water hole 
next <grin>. My particular RF ground was designed for convenience, not 
quality.

Take care,
Bart

Tesla list wrote:

>---------- Forwarded message ----------
>Date: Thu, 28 Jun 2007 16:15:28 +0000
>From: David Rieben <drieben@xxxxxxxxxxx>
>To: Tesla list <tesla@xxxxxxxxxx>
>Cc: drieben@xxxxxxxxxxx
>Subject: Re: grounding miscellaneous stuff (fwd)
>
>Hi Bart,
>
>I noticed you stated that you hook one of the "ears" of your double
>bushing pole pig AND the case to RF ground. In my pole pig coil, I
>also hook one of the ears to RF ground, but I hook the case of the
>pig to the mains ground. I'm not sure which is best, but I do know 
>that w/ a double eared pig, the case is completely electrically isolated
>from either end of the HV winding of the transformer, so you can run 
>the RF/mains ground in the way that I do it and keep them properly 
>seperated. I suppose it's a matter of preference. You are absolutely
>correct about the control panel surfaces shocking you if you do not
>keep the RF ground seperated from it, though.
>
>David Rieben
>
>-------------- Original message -------------- 
>From: "Tesla list" <tesla@xxxxxxxxxx> 
>
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>>---------- Forwarded message ---------- 
>>Date: Tue, 26 Jun 2007 02:21:06 -0700 
>>From: Barton B. Anderson 
>>To: Tesla list 
>>Subject: Re: grounding miscellaneous stuff (fwd) 
>>    
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>>On my pole pig, I have a 2 eared pig. I connect 1 ear to RF ground and 
>>the case to RF ground (I like to keep the inner winding of my flat 
>>primary at the same potential as the bottom secondary turns, and it 
>>allows only 1 hot wire to be distributed to the cap). Many don't run 
>>with this configuration on pigs. I keep mains ground only at the 
>>components that "I" am in contact with. The current ballast is where 
>>mains ground ends. If I connect mains ground to the pig (with 1 ear RF 
>>grounded), the coils RF base currents will be felt back to the 
>>controller cabinet and little shocks will occur, and they get stronger 
>>with higher power. By keeping the pig case at RF ground and not running 
>>mains ground to it, I eliminate those shocks. They simply do not have a 
>>path back to the controller. However, if I also forgot to connect RF 
>>ground, they would find a path (so never let that happen). 
>>    
>>
> 
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>>Take care, 
>>Bart 
>>
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