Direct Wiring a stove

javajunkie

I have an old house. I am remodeling my kitchen and am putting in an oven. The old oven was directly wired and the issue I am having is there is 4 wires coming out of my oven and only 3 from the circuit box. Black,Red,White,Green are coming from my oven and Black, Red, Ground coming from my circuit box.
Not sure where to put the whit neutral wire. Green to ground I guess, black to black and red to red. But not sure about the white neutral. can anyone help?

sprtskhne33

If you are remodeling, you should run new wire, and go with 6/3 with ground. That way, white to white, black to black, red to red, and ground to green.

Daniel Holzman

You need to read the wiring instructions for your new oven. If you have a straight 240 volt oven, you don't need the neutral wire. If your controls run on 120, you definitely need the neutral, and you need to run 3 wire with ground as previously noted by another poster.

To determine the wire size, you need to check the installation instructions, they will tell you what size breaker you need, which will then tell you what size wire you need.

sprtskhne33

It would be 6/3 with ground and a 50 amp breaker. They are 50amp breakers unless it's a pizza oven.

frenchelectrican

Most wall oven the single verison typically take 30 amp circuit however make sure you have 4 conductor set up to be on safe side.

But for double oven or other odd set up I really advise to read the manufacter info sheet they will list the ampacity on the unit so you can able bring out proper conductor size for it.

Merci.
Marc

sprtskhne33

30 amp is for clothes dryer, not ranges.

frenchelectrican

Reread it I say OVEN not the range that make the diffrence.

And I have ran quite few single wall oven and most useally wired for 30 amp circuit but the double wall oven useally take 40 amp circuits { unless stated otherwise with manufacter nameplate info }

Merci.
Marc

sprtskhne33

If it's an oven, then it's only 120v not 240v, so all he would need is 20amps max, and plus he didn't state oven, range, or wall oven. just oven but is it gas or electric, thats what you got to look at.

kbsparky

Junkie -- you say there are only 3 wires in the existing box feeding the old oven. Can you describe what the "ground" wire looks like? Is it a single solid conductor (bare or green insulated), or a stranded one that looks like a bunch of small wires twisted together? If it is the latter, you may have type SE cable.

Section 250.140 of the Code allows for type SE cable for ranges, dryers, and ovens where the bare conductor serves as the neutral and grounding conductors collectively in existing older homes. Such a circuit has to originate from the service equipment (not a sub-panel). In that case, both the white and green leads would connect to the bare braided "ground" wire.

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rjniles

He said in the first post that the new oven has a red, black, white and green wire. So very obviously it is a 120/240 volt oven. Electric not gas. I have never seen an electric wall oven that was only 20 amps. He needs to read the ratings plate on the unit or the installation instructions to determine the wire and breaker size required. A new 4 wire cable (3 conductors plus ground) should be installed even though there are some NEC exemptions that allow reuse of 3 wire under certain conditions.

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