UL Spacing requirements 1.5kVThe requirements become a lot easier if you specify that the product can only be used at sealevel, in dry air, in a clean environment!! :) Other than that, be aware that electrons like to jump, especially from sharp points. I can already hear the corona and smell the ozone!! Have fun, Ahne. Does anyone have a reference for the UL requirement for electrical spacing between conductors? I have the one in 2221 but was hoping for a less conservative calculation. Jeffrey A. McGlaughlin CID Engineering Designer --------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8e To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/html/forum.htm for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 -----------------------------------------------------