Original poster: "Godfrey Loudner" <ggreen-at-gwtc-dot-net> Hello Kreso Can you put up a picture of your 500 kv PT at your internet site? A arc image would be nice. Godfrey Loudner >Yep i have a lot of strong transformers from small nst-s to a >PT that spits around 500 kV? ( arc STARTS at 30 - 35 cm and can be bulled >verry long ). Luckily i have a big current instalation in my house