Does anyone have the mathmatical formulas to determine the current carrying capacity of traces. I know this information is available in charts (Fig. 3-4a,b,c in IPC-D-275), but I was wondering if someone has the mathematical formulas used to construct these charts. My plan is to try and write a short program to figure the current capabilities rather than search for my copy of the 275 and a ruler/staightedge each time I need the infomation. On the other hand, if anyone has a script and can share it, I'd love to have it and save myself some time. If I get something together I'll be happy to share it (if I can). thanks....ben Ben Davis Systems & Electronics, Inc. [log in to unmask] *************************************************************************** * TechNet mail list is provided as a service by IPC using SmartList v3.05 * *************************************************************************** * To unsubscribe from this list at any time, send a message to: * * [log in to unmask] with <subject: unsubscribe> and no text. * ***************************************************************************