What should be the minimum external trace width for=20 an in-rush current of 30 Amps for 1 mS.=20 Board is 93 mil thick and uses 1 oz/square foot copper thickness Current for normal operation is 4 Amps. What would it need for 2 oz Thanks, Jean Jean Frigault Electronic Technologist Concept + Inc. 55 Crowley Farm Rd. Moncton NB E1A-7R1 [log in to unmask] TEL:506-858-4838 FAX:506-858-4075 ############################################################## 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 ##############################################################