Wall oven & Cooktop

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monkey

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A customer is remodeling a residential kitchen and has purchased a wall oven rated @ 8.9 KW and a cooktop rated @ 7.4 KW, for a total of 16.3 KW. I am feeding them both with one circuit. According to 220-19, note 4, I can treat this total load as a single range. So looking note 1, I can use the 8 KW rating from column A for one range and add 5% for every KW or major fraction of a KW by which the load exceeds 12 KW. Since the load exceeds 12 KW by 4, (.3 is not a major fraction of one), this is 20%. 8 KW x 1.2 is 9.6 KW or 40 amps @ 240V. So am I correct this circuit can be sized at 40 amps?
 
Get the spec sheet from the GC or owner and see what the manufacture recomends one circuit for two items that are likely to be used at full load at least twice a year does not sound like a good design to me
 
I just got revised numbers, the owner gave me the specs on a double oven. The oven she has is actually only 5.9 KW which brings the figure to 35 amps after doing the math.

msgt I appreciate your advice, but I was asking if I was correct by code, if I was using the right articles and calculations, and if my result was correct. I might use a 50 amp circuit anyways, but I want to know what is minimum without guessing.
 
As far as feeding both with one circuit, this is an island where we have to cut concrete and trench for pipe. I would just as soon keep it to 3/4" pipe.
 
Monkey for what it is worth from the O.P I got the same answer and I think it is proper use of the notes.
 
I appoligize yes your calcs appear correct i just got hung up onthis sounding like a bad design would you consider running 2 conduits one for the range and small appliance circuit and one for the oven.
 
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