PCB designers please help! We are designing 2 oz copper PCB with the plain which suppose to carry 30 amps. 1. How many vias would be necessary to transfer 30 amps from one side to another? 2. Does the via need relief (wagon wheel) or may be solid? 3. What should be the via size (0.020" or 0.031") Any input would be greatly appreciated. Thank you, Stella Neyman Eaton Inc. ############################################################## 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 Gayatri Sardeshpande at [log in to unmask] or 847-509-9700 ext.5365 ##############################################################