numbers on pigs

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

Original poster: "by way of Terry Fritz <twftesla-at-uswest-dot-net>" <Kidd6488-at-aol-dot-com>

Hello everyone, 

I have been wondering what the numbers on pigs meen.  I've seen 15, 25, 37.5, 
100 and others. Is this kVA or what? 

thanks, 
Jonathon Reinhart