"Paul Victor Birke" wrote in message
...

I believe air at standard pressure and temp kicks over at ~ 28.5 kV/inch

So with 80 volts you need 80/28500 or 0.003 " . So you should have no
problem at 0.001"

Spark erosion machining with 2 HP Printer
wallwarts, I think some 'industry' purchasing
departments will be kicking themselves.