![]() He explained that under normal operations, the AC unit may pull more than 30 amps and would trip a 30 amp breaker so most installers use a 40 amp breaker. This breaker provides two single pole and one double pole circuit in two spaces. The inspector noted that the 30 amp AC unit is connected to a 40 amp breaker. Compatible with Homeline load centers and CSED devices. Designed to protect against overloads and short-circuits. 2-Pole Type A Wadsworth Replacement Circuit Breaker: Price 48 83 51 61 55 70 96 99. ![]() We use 9.6kW here because the table 220.55 sizing overrides the normal continuous-load provisions in the NEC, by the way. Square D Homeline 20-amp/40-amp 4-Pole Quad Circuit Breaker. 2-Pole Zinsco Type RC Replacement Circuit Breaker: New UBIA 40 Amp 2 in. ![]() For ranges individually rated more than 12 kW but not more than 27 kW, the maximumĭemand in Column C shall be increased 5 percent for each additional kilowatt of rating or major fraction thereof by which the rating of individualįrom this, we get a 15% upward adjustment on the Column C value, or 8kW * 1.15 = 9.2kW, which is less than the 9.6kW a 40A circuit can handle, so the OP is good to go. Over 12 kW through 27 kW ranges all of same rating.Shall be calculated by adding the nameplate rating of the individual appliances and treating this total as equivalent to one range.Īs a result of this, we take the baseline 8kW from Column C of table 220.55 for a single 12kW range, and then apply the Note 1 adjustment as the range in question is a 13.2kW unit: The branch-circuit load for aĬounter-mounted cooking unit and not more than two wall-mounted ovens, all supplied from a single branch circuit and located in the same room, Load for one wall-mounted oven or one counter-mounted cooking unit shall be the nameplate rating of the appliance. It shall be permissible to calculate the branch-circuit load for one range in accordance with Table 220.55. Installing a 50A breaker on wiring only designed to support 40A is dangerous and can result in a house fire. Ranges and cooking appliances shall be permitted to be inĪccordance with Table 220.55 and shall be sized in accordance Range/cooker loads in the NEC are governed by the demand factors in Table 220.55 this is stated outright in NEC 422.10(A) paragraph 4:īranch circuits and branch-circuit conductors for household
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