Original poster: "Stolz, Mark by way of Terry Fritz <twftesla-at-qwest-dot-net>" <Mark.Stolz-at-st-systems-dot-com> Hi All! I am paralleling three NSTs together and wanted to verify my PFC calculations. I have a 15/60 with PFC(495VA), a 15/60 (890VA) and a 15/30 (450VA). According to my calculations I'll need 187mfd for 75% PFC because the one NST has PFC already. Does this sound correct? Mark Stolz Houston, TX