This is just my opinion, but I would think that it would be wise to ground the outer metal case of the huge cap and if you decided to ground one of the terminals, I don't think it would matter which one. As much as the National Electrical Code manual harps on grounding and bonding (Article 250), I would be wary of leaving the outer case of such a huge capacitor ‘floating’, as I’m sure that it could pick up a significant charge from mere electrostatic induction from the internally charged plates in such close proximity to it.
David Rieben,
Memphis, TN
Sent from my iPhone
> On May 8, 2019, at 10:48 PM, Steve White <steve.white1@xxxxxxxxx> wrote:
>
> This is not strictly a tesla coil question but it is closely related and I can't find an answer elsewhere.
>
> I am building a quarter shrinker based on a large (100 uF, 22 KV, 24 KJ) Aerovox pulse capacitor. This is a 2-terminal unit. My question concerns grounding. I plan on grounding one of the terminals. Should I also ground the case or just leave it floating? My ohmmeter shows no connection between the case and either of the two terminals. My capacitance meter shows negligible capacitance (5 nF) between the case and either of the two terminals. My current thinking is just to let the case float and keep it away from any conductors.
>
> Steve White
> Cedar Rapids, Iowa
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