IPC-D-275 has information giving temperature rise of conductors, external and internal, for different constant current values. Is there any information that exists for determining the same information for pulsed currents? I would surmise that the conductor widths and weights would decrease from the DC values for the same temperature rises? Wm. Dean May NSWC Crane Bldg. 38, Code 8086 300 Highway 361 Crane, IN 47522 812-854-3073 --------------------------------------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8d 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 delivery of Technet send the following message: SET Technet NOMAIL Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ---------------------------------------------------------------------------------