Load Calculation

Compute connected and demand loads for dwelling units, multifamily buildings, commercial occupancies, feeders, motors, and HVAC systems per NEC 2023.

Calculation Method

Building / System Information

220.12, 220.14

Gross Floor Area220.12

ft²

Voltage System

Small Appliance & Laundry Circuits

220.52

Minimum 2 small-appliance circuits at 1,500 VA each (220.52(A)) and 1 laundry circuit at 1,500 VA (220.52(B)).

Small Appliance Circuits220.52(A)

Laundry Circuits220.52(B)

Combined with general lighting and subject to Table 220.42 demand factors.

Fixed Appliances

220.53

Cooking Equipment (Range / Oven)

220.55 / Table 220.55

Range Nameplate Rating220.55

Number of RangesTable 220.55

Note 4: Single range ≤ 8¾ kW → 8 kW demand.

Note 2: Range > 8¾ kW to ≤ 12 kW → Col C at 12 kW.

Note 1: Range > 12 kW → add 5% per kW over 12 kW.

Electric Clothes Dryer

220.54 / Table 220.54

Dryer Nameplate220.54

Number of DryersTable 220.54

Minimum load 5,000 VA per 220.54. Demand: 1–4 units = 100%; 5 = 85%; 6 = 75%…

HVAC — Heating & Cooling

220.60

Enter heating and/or cooling connected load. Noncoincident rule (§220.60) uses the larger value — both loads are not added together.

Heating Connected Load220.60

Cooling Connected Load220.60

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Results will appear here

Enter the required inputs to the left to compute load.

Disclaimer: This tool assists with NEC 2023 load calculations per Articles 215, 220, 230, 430, and 440. Results are for reference and design-assist purposes only. Final electrical designs must be reviewed and stamped by a licensed electrical engineer and verified against local AHJ requirements (including Miami-Dade/Florida Building Code amendments, local amendments, and any applicable energy codes). Always consult the current adopted edition of NFPA 70 for your jurisdiction.