Class A - Fire Alarm Calcs

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knj777

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I have a project that requires a Class A NAC circuits. I know how to do a voltage drop on Class B NAC's. But dont know how to do the Class A. I already have voltage drop calculators done in excel spreadsheets, but I dont know where to put the wires going back to the panel on it.
Does anyone have a volt drop calculator I could use that's already firgured for Class A?
 
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