Folks, We have a case where the IPC-2222 recommendation for thermal relief (total .160 cumulative copper web for all layers) is exceeded by the current carrying requirement of the circuit on a through hole pin. The IPC specification states that "the total of the thermal relief cross-sectional area divided by the number of planes connected to the plated-through hole shall not violate current carrying capacity requirements for a given hole". Then the spec goes on to state on the master drawing where this violation occurs in the layout. I was wondering if other folks typically use web sizes greater than the recommended .160 cumulative. If so, how large? Also, how are these leads being soldered - hand, wave-flow? Thanks much for your help! Regards, Rick --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 15.0 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/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 -----------------------------------------------------