I have seen a few of your posters over at alt.engineering.electrical asking questions about sizing conductors. I have written two very useful 2005 NEC compliant web page calculators that do what you are looking for and they are out of the beta stage and in the alpha stage. In other words, known bugs are fixed. It has taken me about 10 years on and off and about 2000 hours to write these programs. I am a licensed electrician in two states and a licensed electrical administrator in the state of Alaska and have a degree in Mathematics. The programs are free to use. The programs are at:
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17 years ago