He's got one of those "Mr. Inspector" gadgets that simulates a 15 or 20 amp load when plugged into a receptacle. I was told a few years ago when the city got one of these gadgets that if the circuit was 12 ga. wire, 20A CB but 15A duplex receptacles you weren't required to simulate a load greater than 15A since the receptacle doesn't accept a 120V 20A cord cap.
I don't use 14 ga. wire but I do put 8-10 receptacles on a 12 ga. 20A GP circuit. I've checked for VD using a 1800W portable heater and never gotten more than 2% with it plugged into the last outlet. I don't think it's a valid concern. All loads in a house of any significance are already taken care of in the calculation such as laundry and small appliance circuits. I do put the fridge, microwave, dishwasher and disposal on dedicated circuits in addition to the 2 small appliance circuits. I think that more than covers the loads.
