Re: SSTC Board - Spacing Requirements for High Voltage

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Dr. Resonance by way of Terry Fritz <teslalist-at-qwest-dot-net>" <resonance-at-jvlnet-dot-com>


At 220 volts I would allow at minimum of 0.400 inches.

The problem isn't so much the clean board but the handling after delivery.
If someone puts a nice thumbprint across the 220 trace the deposited sodium
chloride may cause tracking --- the main problem as the voltage increases.

All receivers of this powerboard should be sure to wipe it clean with
alcohol and then handle with rubber gloves.  It only takes a fingerprint
(unseen) in the wrong area to create some nice fireworks.

Dr. Resonance

Resonance Research Corporation
E11870 Shadylane Rd.
Baraboo   WI   53913

 > case, what would be a minimum spacing for traces on FR-4???
 > I typically never worry about this since all high voltage boards I design
 > have AMPLE spacing between traces.
 > Right now, maximum spacing for this package in its current position is
about
 > 0.050 inches.  Not too much.   I may not be able to put the TO-247 pads in
 > place, so you may have to resort
 > to manually soldering the packages on the existing miniBLOC pads which
 > shouldn't be much of a problem.