We currently have a gas range cook top with electric oven underneath that is hooked up to a 40 amp breaker via 8/3 romex wire. We are replacing this with an all gas range/oven that only requires 120 volts/15 amp breaker. My question is can I use the existing 8/3 wire by splicing 12/2 via one junction box at the service panel end and another box in an accessible spot just before the new oven, capping off the red wire at both ends? I'd then replace the 40 amp breaker with a 15 amp and connect 12/2, then connect the other spliced 12/2 into a new receptacle for the oven.

My original plan was just to attach fishing wire to the existing 8/3, pull out the 8/3 from the service panel, then attach 12/2 to the fishing wire and fish that through to the service panel. I will go this route if I have to but it involves several cuts into drywall, undoing bulkheads and acoustic tiles, etc.


1 Answer 1


Yes, that is acceptable. You don't need a junction box at the service panel end. You can have a pigtail in the service panel. You also don't need another box for the oven. Just remove the existing receptacle, pigtail on some 12 gauge wire, and put in a standard outlet.

Keeping the 8/3 in place also allows for future replacement with an electric oven by swapping out the receptacle.

  • OK - I was just concerned about having space for a pigtail in the new receptacle box, going from 8 gauge to 12 gauge. Nov 26, 2018 at 19:04
  • 1
    If it's a tiny single-gang box, you're probably right. But if it was done right with a double-gang box, you should be fine.
    – longneck
    Nov 26, 2018 at 19:05
  • You don't even need a pigtail in the service panel if the new breaker can take #8. Many can. Nov 26, 2018 at 19:31
  • I just saw this online: reliableparts.ca/product/Gas-Range-Power-Adapter-1515526/475472 Seems too good to be true. Does this just plug into the 220 receptacle that my current oven is using, and I would plug the new oven into the adapter? Would I still need to change the breaker? Nov 26, 2018 at 20:09
  • 1
    Why new work? You probably want an old work box. But your plan sounds OK.
    – longneck
    Nov 26, 2018 at 20:31

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