Electric Single Oven and Warming Drawer

[dpenbert]

First question: Is an 120/208V electric single oven (requiring a 30A connection) and/or an 120V electric warming drawer serving a residential kitchen considered a continuous load?
Second question: If the maximum load on the oven is 22.1 amps and the maximum load on the warming drawer is 3.8 amps, would a 30A circuit with #10 conductors be sufficient if you combined these two appliances on the same circuits? If these are considered continuous loads, I would say a 30A circuit would not be sufficient.
Usually I would figure on running separate feeds to each appliance based on the appliance electrical requirements, but they can be combined to save a homerun. Any recommendations?

Thanks,
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David - St. Louis

 

[charlie b]

Re: Electric Single Oven and Warming Drawer

220.55 speaks of ranges, ovens, counter-mounted cooking units, and other household cooking appliances. I believe that the warming drawer does not count as being one of these. So you only have one cooking appliance. Note 4 to Table 220.55 says that the branch circuit load for a single cooking appliance shall be the nameplate rating of the load. It doesn't say you have to then add 25% for the appliance being a "continuous load." In my view, a range or other cooking appliance does not need to be treated as continuous, since the table gives us the proper load to apply. Your total load is 22.1 + 3.8, and that is below 30. My answer is that you can use #10 conductors and a 30 amp breaker to supply both of these items.