Household Range Demand Load (NEC Table 220.55 Col. C)

ScopeOne 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 or tabledemand_kw = ColumnC(num_ranges) x (1 + increase); increase = 0.05 x round(nameplate_kw - 12) for ranges over 12 kW, else 0 (Note 1 counts a kW 'or major fraction thereof' -- round-half-up, not ceil); demand_a = demand_kw x 1000 / supply_v. Column C: 1->8, 2->11, 3->14, 4->17, 5->20 kW.

Source and editionHousehold electric ranges, wall ovens, and counter-mounted cooking units, NEC 2023 Table 220.55 Column C and Note 1, by name.

Free accessNEC is free to read at nfpa.org/freeaccess. Equal-rating Column C with the Note 1 over-12 kW increase, and under 8.75 kW the Note 3 Columns A/B percentages by count (added 2026-10-09; spot values A 10 = 49%, B 10 = 34%, B 9 = 35%, B 4 = 50% agree with EC&M worked examples); Note 2 unequal-rating averaging is not modeled.

What governsEstimate. AHJ and licensed electrician govern. Verify against the NEC edition adopted in your jurisdiction.

API field namesnum_ranges, nameplate_kw, supply_v, col_c_kw, demand_kw, demand_a

• Column C series 8 / 11 / 14 / 17 / 20 kW for 1-5 ranges, 15 kW + 1 kW per range for 6-40, 25 kW + 0.75 kW per range for 41 and overNEC Table 220.55 Column C
• Note 1 increase a range over 12 kW adds 5% of Column C per kW (or major fraction) above 12 kWNEC Table 220.55 Note 1
• Columns A and B under 3.5 kW Column A, 3.5 to 8.75 kW Column B: the column percentage for the count times the summed nameplates (80/75/70... and 80/65/55... down to 30% and 16% at 61 and over)NEC Table 220.55 Columns A and B, Note 3