As far as UL and AC goes......hipot testing and ground bond test the input side at least. Been there...done that. Quite fun to see a board arc at 1500 volts. _________________________________________________________________ Help STOP SPAM with the new MSN 8 and get 2 months FREE* http://join.msn.com/?page=features/junkmail -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics