Badge Credit Card Voltage Drop Tolerances バッジ

Front is single phase 120/240 and common breaker sizes, back is three phase 208/480 and common breaker sizes. NEC advises 3% branch, 5% total, so 2% tolerances included. 2% branch and 2% feeder = 4% total. Wire size determined via ampacity chart using 90C rated insulation on copper conductors, and next two wire sizes for the rated amps.