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Standard Method Dwelling Unit Load CalculationsOptional Dwelling Unit Load CalculationsExisting Optional Dwelling Unit Load Calculations
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Lighting & Receptacles, 220.42ServiceNeutralServiceService
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General Lighting 4,000 3 12,000 General Lighting 12,000 General Lighting 12,000
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Small Appliance 1,500 2 3,000 Small Appliance 3,000 Small Appliance 3,000
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Laundry 1,500 1 1,500 Laundry 1,500 Laundry 1,500
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Total Connected Load 16,500 Dishwasher 1,200 Dishwasher 1,200
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First 3,000 VA at 100%
3,000 100% 3,000 3,000 Waste Disposal 600 Waste Disposal 600
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Remainder VA at 35% 13,500 35% 4,725 4,725 Microwave 1,600 Microwave 1,600
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Total 7,725 7,725 Water Heater 30,720 Water Heater 30,720
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Appliances, 220.53ServiceNeutralCar Charger - Car Charger
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Dishwasher 1,200 1 1,200 75% 900 900 Other Appliances - Other Appliances
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Waste Disposal 600 1 600 75% 450 450 Other Appliances - Other Appliances
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Microwave 1,600 1 1,600 75% 1,200 1,200 Dryer 5,000 Dryer 5,000
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Water Heater 30,720 1 30,720 75% 23,040 Cooking Nameplate 14,000 Cooking Nameplate 14,000
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Car Charger1 - 75% - Cooking Column BCooking Column B
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Other Appliances - 75% - Cooking Column ACooking Column A
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Other Appliances - 75% - 69,620 69,620 69,620
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Total 34,120 75% 25,590 2,550 First 10kW @100%10000100% 10,000 First 8 kW at 100%8000100%8000
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Dryer, 220.54ServiceNeutral
Remainder kW at 40%
 59,620 40% 23,848 Remainder kW at 40% 61,620 40%24648
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Dryer 5,000 1 5,000 100% 5,000 3,500 Heat, up to 4 units - 65% - Heat at 100% - 100%0
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ServiceNeutralHeat, over 4 units - 40% - Heat, Over 4 Unit - 40% -
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Range #1, Column C1400018800100% 8,800 6,160 A/C or Heat Pump 10,000 100% 10,000 A/C or Heat Pump 10,000 100% 10,000
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Range #2, Column C0100% - - Total Demand Volt-Amperes 43,848 Total Demand Volt-Amperes 42,648
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Cooktop, Column B080% - - Total Demand Amperes183Total Demand Amperes178
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Oven, Column A080% - - Service Equipment Amperes200Service Equipment Amperes200
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Total 8,800 6,160 Conductor Amperes at 83%166Conductor Amperes at 83%166
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Heat versus A/CServiceNeutralConductor Size2/0Conductor Size2/0
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A/C #1100001 10,000 10,000 Conductor Ampacity, Table 310.15(B)(16)175Conductor Ampacity, Table 310.15(B)(16)175
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Heat #11 - 0
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Heat Pump #1 - -
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A/ C #2 - - -
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Heat #2 - -
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Heat Pump #2 - -
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Standard Method Dwelling Unit Load Calculations
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ServiceNeutral
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Lighting and Receptacles 7,725 7,725
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Appliances 25,590 2,550
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Dryers 5,000 3,500
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Cooking Equipment 8,800 6,160 This Table is for Formulas Only
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A/C versus Heat 10,000
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ChargerCuSizeAL
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Total Demand Volt-Amperes 57,115 19,935 211025
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Total Demand Amperes2388331840
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Service Equipment in Amperes25051650
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Conductor Amperes at 83% of Service Equipment Size2088366465
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Conductor Size4/0486375
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Conductor Ampacity, Table 310.15(B)(16)23085101290
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1161100
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Neutral Conductor Must Be Sized No Smaller Than 250.66
1311/0120
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1512/0135
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1763/0155
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2014/0180
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231250205
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256300230
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286350250
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311400270
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SizeCuAL
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103025
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85040
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66550
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48565
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39075
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211590
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1130100
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1/0150120
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2/0175135
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3/0200155
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4/0230180
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250255205
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300285230
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350310250
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400335270
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