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Old 12-02-2011, 07:59 PM   #1
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Built in oven and cooktop wiring question


I'm updating my kitchen and replacing my conventional oven with a built in oven and countertop mounted cooktop. What is the easiest way to wire them together into a new three prong plug so I can use the existing outlet without having to run new wiring for a new outlet? Also, will I need to upgrade to a bigger breaker? Existing breaker is 60 amps for 50 amp outlet. Stove and oven together will draw 60 amps (supposedly).

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Old 12-02-2011, 09:29 PM   #2
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Built in oven and cooktop wiring question


You need 2 separate circuits. The wire and breaker sizing depends on the rating of each appliance.
You may be able to reuse the existing wiring for one of the circuits depending on what you have existing.

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Old 12-02-2011, 10:13 PM   #3
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Built in oven and cooktop wiring question


agree, they both need dedicated breakers. be sure to use the correct size wire with the breaker
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Old 12-02-2011, 10:20 PM   #4
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Built in oven and cooktop wiring question


How is the wiring possible without removing drywall from the plug to breaker box?
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Old 12-02-2011, 10:26 PM   #5
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Built in oven and cooktop wiring question


depends on your house, if you're lucky you can snake along side of the existing wire. most likely the old wire is stapled and runs thru a hole only big enough for the existing wire. if you have acces from the basement, it may be done without removing drywall. use fishtape or a long piece of wire to pull the new line.
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Old 12-02-2011, 10:47 PM   #6
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Built in oven and cooktop wiring question


Well there goes my weekend plans. Guess demo/remodel will stop till I figure out a different way or purchase a new range.
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Old 12-03-2011, 04:50 AM   #7
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Built in oven and cooktop wiring question


Don't listen to the nay-sayers here.

In most cases, you can install a junction box on that circuit, and connect both the oven and cooktop to the same circuit. As long as you have performed proper demand load calculations, and the circuit is sufficient to handle them both. See section 210.19(A)(3) of the NEC.

Tap rules allow for this as well, outlined in exception No. 1.

So the question now is: What are the actual nameplate ratings of both appliances?

You need to add them together, and then apply demand factors as found in table 220.55 (pay attention to Note 4) to determine if you need to replace the circuit or not.

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