Bill, Someone has already suggested ionizing air streams for reducing electrostatic charges during mask and demask. I assume that the operator, spray booth, workpiece support and spray gun nozzle are all at ground potential. Of course, the circuit itself must also be at this potential. For ultimate protection, I'd also attach a shorting bar across all connector fingers and tie that to your ground buss. Remember, all those tiny blobs of conformal coating are non conductive. I also assume that your earth ground is totally isolated from all electrical feeds and prepared in such a way as to be effective in all climatic conditions.(such as very dry) There is a Mil Spec on earth grounding stations. This information was all gathered in another life, so I don't remember the specific specification. The opinions stated herein are not those of my employer. Lyn R. Lynch 602.276.7361 *************************************************************************** * TechNet mail list is provided as a service by IPC using SmartList v3.05 * *************************************************************************** * To unsubscribe from this list at any time, send a message to: * * [log in to unmask] with <subject: unsubscribe> and no text. * *************************************************************************** * If you are having a problem with the IPC TechNet forum please contact * * Dmitriy Sklyar at 847-509-9700 ext. 311 or email at [log in to unmask] * ***************************************************************************