13/01/99 4:08:28, you wrote : <<Original Poster: NickandSim-at-aol-dot-com normal transformer wire is insulated to 7kV. What sort of voltage are you running at to need more than that ? >> ( for a magnifier ) 1) 60 kV / 150 V - 5 kVA potential transformer and 4 x 0.05 µF -at- 50 kV Maxwell cap. ( 0.05 µF -at- 100 kV) - 4- stack 10 A Variac . or 2) 15 kV / 220 V - 7.5 kVA pole pig (used in my dual TC system ) . Lyonel