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For a total of three units being serviced by a 60 amp breaker. Right now the double oven is run from 240V, and I need to add a 240V circuit for the microwave oven (there is only a 110V there now)

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    Your microwave runs on 240? Also, what's to stop someone from using the oven and the microwave at the same time? – Hari Ganti Jun 14 '18 at 22:04
  • Commercial microwave? – Tyson Jun 14 '18 at 22:48
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    Also what country? – Tyson Jun 15 '18 at 0:22
  • A 240v microwave must be over the pond? If in us it may be possible but we would need the listed values of all 3, 240v devices – Ed Beal Jun 15 '18 at 1:02
  • Where are you on this planet? Can you provide the make and model of all three appliances? – ThreePhaseEel Jun 15 '18 at 7:50
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No. Ovens should be on their own circuit. While you can put them on the same circuit and only use one at a time, having multiple High Amperage Draw Appliances on a circuit is not a good idea!

Just think about it...cake in one oven turkey in the other, then heating the gravy in the microwave would result in a trip to the circuit breaker panel to reset the breaker.

If the breaker and wiring match Gauge and Amperage(i.e. 12 gauge and 20 Amp Breaker) then having multiple Appliances of 20 Amp is fine....the breaker will do its Job and protect the wiring! If multiple draws are going on at same time...breaker might trip thereby preventing a house fire!

Always a better idea to have the Appliances on their own circuit...even if it is not required by code. Especially these days with heater coils in dishwashers to heat and sanitize the dishes.....and large 36 inch double ovens!

  • While this is technically an answer, it doesn't really explain why not. Expanding this would help the answer – Machavity Jun 15 '18 at 0:28
  • This completely disregards the explicit NEC language permitting multiple cooking appliances on a single circuit -- see NEC 210.19(A)(3) Exception 1 for details, as well as Table 220.55 including the footnotes... – ThreePhaseEel Jun 15 '18 at 8:10

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