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My old range from the 1970s has two 30A circuits coming to it. New ranges all use a single 40A circuit. Can I join the two sets of wires into a single 60A breaker? The circuits would be joined at both ends to a new 60A wiring, one to range and one to new breaker.

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  • Where are you located? What is the make and model of the new range?
    – Tester101
    Commented Aug 22, 2015 at 21:41
  • Looking around it seems I can't do what I suggest! I'm in the Bay Area. No range yet, I'm looking on craigslist
    – Daniel K
    Commented Aug 22, 2015 at 22:05
  • What is the wire size at the breaker and receptacle? Should be the same but you never know.
    – WarLoki
    Commented Aug 22, 2015 at 22:07

1 Answer 1

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Bottom line is NO, you definitely cannot do what you propose. You CANNOT parallel a circuit like this of this size. It is expressly forbidden in the NEC, and could very well be a safety hazard.

If the appliance takes two separate circuits like your old one that is a different story. Do you know what size and type of wire is feeding the old 30A circuits?

Also, all "new ranges" definitely do not use a 40A circuit. Many can, but many also have too great a draw for a 40A circuit.

The NEC allows any household cooking appliance 12kW or under to be served by a 40A circuit, but I see more and more basic units over 12kW.

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