I once wired a 2 story house that had 3 seperate Heat & Air units. The heaters were all gas, so 20amp/120v circuit only to them. But two a/c units required 30 amp/240v circuits and one a/c unit required a 40 amp/240v circuit.
So when calulating the service load would you use only 100 percent of the largest a/c unit, or 100 percent of all 3 a/c units, or 100 percent of average of all 3 added together? Or just how would this be placed in your calculation table for finding the service load?
Thanks for your input. Still studying for that masters/contractors exam!
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