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NEC Load Calculator (Multifamily and Apartment)
Building Load Calculation
Voltage
240 V
208 V
Phase
Single-Phase
Three-Phase
⚠️ Do not select Three-Phase when Voltage is 240 V
House Load (VA)
House load refers to the electrical demand for common areas and shared systems in a building, such as lighting,irigation system, elevators, and fire alarm.
A multifamily calculation requires at least 3 dwelling units.
+ Add Unit
– Remove Unit
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Calculate
Unit __number__
Unit Name
Number of Units
Floor Area (sqft)
Garbage Disposal (VA)
Enter nameplate VA, or set 0 if not included.
Dishwasher (VA)
Microwave (VA)
Garage Door Opener (VA)
Refrigerator (VA)
Custom Appliances
+ Add New Appliance
Custom Appliance 1
VA 1
Range (VA)
Dryer (VA)
Water Heater (VA)
HVAC CU/HP (VA)
HVAC Fan Coil (VA)
EV Charger (VA)
Largest Motor (VA)
Custom Load (VA)
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