Household Range Demand Load (NEC Table 220.55 Col. C)
The demand load for household electric ranges by NEC Table 220.55 Column C, with the Note 1 over-12 kW increase: one 12 kW range demands 8 kW (not 12), so 33.3 A at 240 V; a 16 kW range adds 5% per kW over 12 (20%) to 9.6 kW / 40 A. Multiple equal-rated ranges read Column C directly. Notes 2-4 (the Columns A/B paths and unequal-rating averaging) and the AHJ govern the other cases.
Formula and source
demand_kw = ColumnC(num_ranges) x (1 + increase); increase = 0.05 x ceil(nameplate_kw - 12) for ranges over 12 kW, else 0; demand_a = demand_kw x 1000 / supply_v. Column C: 1->8, 2->11, 3->14, 4->17, 5->20 kW.
Household electric ranges, wall ovens, and counter-mounted cooking units, NEC 2023 Table 220.55 Column C and Note 1, by name.
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