Using the optional method of service calculation, calculate the size (in amperes) of a 120/240-volt service disconnecting means when the total load of a one-family dwelling is 67,500 VA (ignoring or excluding air conditioning loads as well as heating loads)?.Correct Answer: Using the Ohm’s Law Formula Wheel: I = P/E = 1,400 Watts / 120 Volts = 11.67 amperes.What is the calculated minimum ampacity rating of the branch circuit conductors given the following residential appliance?.Switch #2 connected to the 14 AWG wires: 2 x 2.00 = 4.00 cu-in.Switch #1 connected to the 12 AWG wires: 2 x 2.25 = 4.50 cu-in.
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