Installing New Wall Oven

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  #1  
Old 12-21-19, 02:18 PM
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Installing New Wall Oven

I am installing a new wall oven. My house has 3 wire aluminum wiring. The oven has four wires but has instructions as how to wire it to a 3 wire junction box. The old oven had a 30A breaker but the specs for this new oven (Frigidaire
FFEW242FFEW2) call for a 20A MINIMUM. Should the 30A breaker be changed to a 20A?

EDIT: I think I have just answered my own question. Sticker inside of door says 3.7KW @ 60 HZ on a three wire system. Installation guide says 20A protection circuit for less than 4800W. So, we are basically talking about 3700 Watts.
 

Last edited by PJmax; 12-21-19 at 04:13 PM. Reason: To Give More Insight
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Old 12-21-19, 02:27 PM
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Since it states 20A minimum it is fine on the 30A.
 
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Old 12-21-19, 02:39 PM
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Welcome to the forum.

It's a judgement call. For a 3.7kw (15A) load....... I'd replace the 30A with a 20A but it is ok on a 30A breaker. Be sure to use the proper connections for connecting the copper to aluminum.

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Old 12-21-19, 03:17 PM
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Just Looked At Wiring

I just removed the old oven and the wiring looks copper to me. Someone in the past told me that the house had aluminum wiring. This is 10 AWG, the wiring provided with the oven is 16 AWG. Are there any special precautions I should take connecting it?

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Last edited by PJmax; 12-21-19 at 04:10 PM. Reason: added pic from link
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Old 12-21-19, 04:12 PM
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That is copper.
That is 10-3 but I can't tell what.
It's either old NM cable with no ground or BX. Either cable is not terminated correctly. The cable connects to the the splice box with an approved connector. There is NO connector in your picture.
 
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Old 12-21-19, 04:50 PM
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You need to check for a ground. I'm not seeing it. If you have a meter check for continuity between the white and the box.
 
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Old 12-21-19, 05:12 PM
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Pic Before Oven Was Removed

This is what the wiring looked like before I removed the oven. Notice the bare copper wire running from the oven and connected to the white wire. The oven was here when we moved in and it ran well for us for nine years.

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Last edited by PJmax; 12-21-19 at 09:22 PM. Reason: added pic from link
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Old 12-21-19, 05:22 PM
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Picture not working. all I see is blank screen.
 
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Old 12-21-19, 05:25 PM
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I cannot say why the wired it that way.

But you have instructions on how to 3 wire it so follow those instructions.
 
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Old 12-21-19, 09:26 PM
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You need to look at the cable coming into the back of the box. It needs a proper connector. You cannot just bring separate wires into the box. There may be a ground in that cable that was cut off.

That box must also be connected to ground.
 
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Old 12-27-19, 09:56 PM
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Is This True

My said something to her father about me installing the wall oven and he claims that it is illegal to wire your own oven up within any city limits if you are not a licensed electrician, I have never heard this in my local. He also says that it can void my home's insurance. I had to go out of town and haven't wired the oven. I have everything needed to wire and power the oven (changed breaker to 20A) including the grounding screw for the junction box. The illustrations with the manual seem clear and straightforward. I think he does not know what is talking about and full of it. Is it that much of a risk? He lives 100 miles away and knows nothing about the ordinances in my town.
 
 

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