Caps DC to AC rating

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

Original poster: "kevin wilson by way of Terry Fritz <twftesla-at-uswest-dot-net>" <thebiggiantkevin-at-hotmail-dot-com>

In Terry’s MMC calculator, I am asked for a caps AC voltage rating. Given 
the caps DC rating, how do I get the AC rating? I found a few references to 
this question in the archive. From what I could understand the AC rating 
will be somewhat lower than the DC rating. And the caps actual AC voltage 
rating is inversely proportional to frequency due to partial discharge and 
properties intrinsic of the dielectric. But I couldn’t find a definite 
equation. If anyone has an equation or at least a general guide, please post 
it. Thanks, Kevin, thebiggiantkevin-at-hotmail-dot-com
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