I need to hold 1.2kV across tracks - covered with Solder resist masking. Operating temp. 20-35deg C and RH upto 99 %. PCB matl. is FR-4 1.0mm DS. Could you advise me as to the minimum gap to be kept between the tracks ( they run close to each other for 30 mms) Could somebody help me with arcing distance for 1.2 kV in 95% RH conditions. Thanks Anil Kher