The Electrical Code

220.55 Electric Cooking Appliances in Dwelling Units and Household Cooking Appliances Used in Instructional Programs. Keep in mind that when we use appliances to cook we use them for a real short period of time then it is just a large paper weight. That’s why the demand factor on table 220.54 below shows that when figuring out the wire size. The table explains everything I hope.

“The load for household electric ranges, wall mounted ovens, counter-mounted cooking units, and other household cooking appliances individually rated in excess of 13∕4 kW shall be permitted to be calculated in accordance with Table 220.55. Kilovolt-amperes (kVA) shall be considered equivalent to kilowatts (kW) for loads calculated under this section.

Where two or more single-phase ranges are supplied by a 3-phase, 4-wire feeder or service, the total load shall be calculated on the basis of twice the maximum number connected between any two phases.

Informational Note No. 1: See the examples in Informative Annex D.

Informational Note No. 2: See Table 220.56 for commercial cooking equipment.”