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Dual Fuel Range wiring

5 years ago

Hello All,


Looking for some advice here, and I found a few similar topics online and on Houzz, but I want to make sure I purchase all the right equipment for the job.


We are installing a Wolf DF36650 range. It calls for a grounded, 240/208 VAC, 60 Hz electrical supply, a 30 amp dedicated circuit (total amp is 21). There is no wiring for the range as we're coming from a range top that just used a standard outlet.


My thought was that we should install a plug into the range and a receptacle in the wall rather than hard wiring. This should make it easier to install and remove if there are any issues. The installation guide does not make any mention of which is preferred, but I'm happy to hear everyone's thoughts.


Next, since this is 30 amp, I purchased a 4 wire 30 amp dryer cable and matching receptacle (NEMA 14-30R). I'm wondering if this is correct or is there a different cable I should be looking at. My research online showed most people saying dual fuel ranges require 50 amp, and obviously you can't use a 30 amp cable or wire on a product that requires 50 amp, unless you want to burn your house down. I'm not sure if this is correct though, or if in most instances this would be correct, and in mine, 30 amp is what it should be. If this is correct, it seems to me that even though the cord is called a "dryer cord" it's still the right cord and probably should just be referred to as a 30 amp cord, unless maybe there is a different 30 amp cord I should be using.


My last question, is there a specific 10/4 wire that should be run to the panel? I would say the actual length of the run is about 30 ft but my electrician said we need 50 ft, and wire isn't cheap right now. I don't want to over spend when I do not need to. I'm hoping 35 feet gives more than enough excess.


Thanks in advance for your suggestions


https://www.subzero-wolf.com/-/media/files/united-states/product-downloads/sub-zero-wolf/installation-guides/wolf/dual-fuel-range-installation-guide.pdf

Comments (21)

  • 5 years ago
    last modified: 5 years ago

    Size the circuit wire to use 50 amps. And use a 30 amp breaker and plug. You may want to upgrade to induction. Always keep in mind the future. You won’t have to run new wire. Just change a breaker and a plug.

    Patrick Green thanked User
  • 5 years ago

    agree with Malloy above. The parts costs are similar no matter what you buy. It is really labor and that is what it is no matter what you install


    Rerunning a wire is generally expensive. Changing plus is easy. I see that it is a 36 inch, not a lot of induction 36 but who knows in the future

    Patrick Green thanked delray33483
  • 5 years ago

    I don't understand the reasoning above. Most electric ranges require a 50 amp circuit. So why not future-proof the kitchen range circuit by installing 50 amp breakers, #6 gauge cable, and a 50 amp, 4-prong outlet? Attach a 4-wire range cord to this range and you're good to go and your kitchen is ready for any range someone decides to install in the future.


    How to Wire a 120/240-Volt Outlet for an Electric Range

    Patrick Green thanked wdccruise
  • 5 years ago
    last modified: 5 years ago

    Thanks for the insight. I did just spend 10k+ on a new range, we're not changing, and enjoy cooking with gas. If we use a 50 amp wire to the panel, we should still be using a 30 amp receptacle, and cord to the range, correct?


    Edit: posted this before I saw WDC's reply. Yeah it seems to make sense that if we would wire it for 50 amp, just get a 50 amp receptacle, breaker, cord, etc.


    Thanks

  • 5 years ago
    last modified: 5 years ago

    I don't see any 30 amp, 4-prong range cables; they all have 3 prongs. The 30-amp 4-prong outlets and 50-amp 4-prong outlets are different. Install a 50-amp outlet and use a matching 50-amp cable.

    The range specs allow you to use a 30 amp cable so the range can be connected to an old 3-prong outlet.

    Patrick Green thanked wdccruise
  • 5 years ago

    Thanks, I'll do the 50 amp as everyone mentioned. Can you link me what 6/4 wire I should be running to the panel? I'm not particularly sure what may or may not be needed. Most of what I see on the web is SOOW which can be used outdoor also and it is likely inflating the price, or maybe not and that is what I need.


    Thanks again

  • 5 years ago

    SOOW is cordage, not cable. It is not to be used to run from the panel to the receptacle. Type AC, MC or NM-B is what you want to look for. You may need to an electrical supply rather than a big-box.

    Patrick Green thanked HU-178658043
  • 5 years ago
    last modified: 5 years ago

    You can’t put a 50’amp breaker on a circuit for a product that requires a 30 amp circuit. It doesn’t provide proper over current protection. Electrical 101.


    As long as the plug and the breaker match, you can have the 6 gauge wire in the wall just fine. The breaker has to match the appliance requirements though. Then it trips appropriately if the range has an issue. If it’s protected by a too large breaker, you just created a fire.

  • 5 years ago

    I agree with the others. It's easier to run the 6 gauge wire now so you can easily switch to a 50amp range later. It's a bit more now, maybe a couple hundred more than the 30 amp wire? It's one of the costs of enjoying a 36” range.


    Please buy 50 feet at a minimum if that’s what your electrician wants. The cable is very thick and you need to make wide loops to turn corners and there’s a bit of slack in the cable when you run it through the wall studs. For the electrical inspection, about 3 feet of extra cable was left dangling in front of my electrical panel. It looks like most of it was used to create the web of wires in side the panel. You don’t want to run short and find you need to add an accessible junction box somewhere behind your cabinets.


    I have 6/3 gauge wire NMD-90 (4 wires: red, white, black and a ground) for the range. Also, we ran a 12/2 cable for the hood range and outlet behind the stove, right beside the stove plug. My all gas range needs a regular plug.

  • 5 years ago

    @User: "You can’t put a 50 amp breaker on a circuit for a product that requires a 30 amp circuit. It doesn’t provide proper over current protection. Electrical 101."

    Rubbish. If that were true you couldn't use a 50 watt light bulb on a 15 amp circuit, or a 15 amp dishwasher on a 20 amp circuit, or a 1200 watt toaster on a 15 amp circuit.

  • 5 years ago

    https://braseelectrical.com/what-appliances-should-be-on-a-dedicated-circuit


    Voltage is not amps. You don’t use a larger breaker than an appliance requires for the same reason you don’t put a penny into one of the old screw in fuses.

  • 5 years ago

    @ZoraAster: "Voltage is not amps. You don’t use a larger breaker than an appliance requires for the same reason you don’t put a penny into one of the old screw in fuses."

    So by your logic I should always turn on all the burners and the oven so I don't have a "larger breaker than an appliance requires" when I'm using it. And I'll be sure to never turn on the oven light by itself.

  • 5 years ago

    I do have an electrician doing the work. He said there is no issue using a 50 amp circuit even if the unit is only a 30 amp. As wdc said, you don't turn on every piece of electrical equipment on a circuit every time you need to power one of the items on that circuit. My electrician agrees as well.

  • 5 years ago

    So then why can we have a lamp plugged into a 15 amp plug? Not being facetious, generally curious as I'm not an electrician.


    Yes he is a licensed electrician, and has done all of the electrical work at my house since I moved in 1.5 years ago.

  • 5 years ago

    Thanks, but then how does the breaker flip if my little light decides to catch fire or something? Maybe it would for some reason be pulling more than 15 amps in this case causing it to shut down?

  • 5 years ago

    My guess is that if you have an appliance rated at 30 Amps plugged into a circuit with a 50 Amp breaker, that's OK, but if it's hard-wired, then the breaker must be 30 Amp. Is that correct?

  • 5 years ago

    OK, I guess the key word is "dedicated". You are saying that you can't put a 30A device on a 50A circuit, right? I was assuming that dedicated meant hardwired; if it's plugged in, then you could unplug it and plug in something else (as long as its requirements didn't EXCEED the capability of the circuit. How about two high-current devices on the same circuit (with the appropriate ampacity)?

  • 5 years ago

    Fieri, Of course I wouldn't use two high-wattage appliances on the same circuit unless that circuit was designed for the combined load.

  • 5 years ago

    Dedicated with regards to ranges/stoves and electric dryers means the circuit serves only that one appliance. Of course you can use 40 or 50 amp wiring and matching 40 or 50 rated receptacle outlet for your 30 amp range but the circuit breaker should match it's 30 amp rating. To avoid any further quibbling in this regard contact your city's electrical inspector for the official explanation.

  • 5 years ago

    Please don't confuse the code for 15 and 20 amp circuits with what applies to higher amperage circuits. Requirements are often much different.

    Electrical code for higher amperage circuits specifies receptacle types, use of 3 wire vs. 4 wire circuits, special rules for devices with electrical motors, special rules for continuous use devices vs. intermittent, a list of devices that require dedicated circuits, etc. For these higher amperage circuits you need to pull a permit, use a qualified electrician, and then have it inspected. Its not the time to be guessing at the right solution.