I asked the same question not too long ago on this venerable list...the answer that came out of it was that it's NOT defined anywhere. No one would say 5V is high voltage, and no one would say 2000V isn't, but where's the precise boundary? No standard. I suppose it warrants some study. Timothy Reeves QA Manager/Process Engineer ECD Circuit Board Division 13626 S. Freeman Road Mulino, OR 97042 (800) 228-8198 Fax (503) 829-5482 -----Original Message----- From: Wanchai Charoendee [mailto:[log in to unmask]] Sent: Tuesday, August 22, 2000 10:17 AM Subject: Measling vs Definition of High Voltage According to IPC-A-600A rev. F "Measling is acceptable for class 1,2,3 except high voltage application". May I learn the definition of 'high voltage ? Thank. Rgds, ############################################################## TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c ############################################################## To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TECHNET <your full name> To unsubscribe: SIGNOFF TECHNET ############################################################## Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information. If you need assistance - contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ##############################################################