My single oven went out and the wife wants a double oven with one
conventional and one convection oven. The current oven is on a
dedicated circuit with #10 wire and a 30 amp breaker. There is no
practial way to change the existing wiring.
The oven web site says the double oven needs to have #8 wire and a 40
amp breaker. The maximum load stated is 8000 W. I have been told (by
amateur electricians) that unless I have both ovens on at the same time
on high heat, I could run the ovens with no problems with the existing
wire and breaker. They believe there is a big enough cushion built in
to allow this operation.
I would appreciate any thoughts on this.
Thanks again to those who offered advice and help. I went with a pr
and it set me back $350.00 but the right size wire and breaker is in.
They were creative in running the wire but everything came out o.k.
Now I just have to wait on Sears. My oven is 7 days past promise
delivery date, but they have assured me (again) that it will be i
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Might work, but it would not be code. I might add that if you had a
fire and the insurance company noticed it (the fire department is likely to
notice it) you would likely find you have no insurance. This would likely be
true even IF that was not the direct cause.
In short, don't do it. I suspect the "There is no practial way to
change the existing wiring." is not exactly true and a professional would
find a practical way of doing it. Sometimes they are nothing short of
It would not be to code.
Sooner or later, both ovens will be on. Why have them if you can't use
If you ever sell the house, the new owner may not take the precautions you
If you do use both ovens eventually it will pop the breaker. You may not
notice that until you go to take dinner out and find it did not cook.
You have the potential to pull more amps than the wire is rated for. Not a
safe condition, especially since ovens tend to stay on for an hour or three
at a time drawing current on that wire.
It may be easier than you think to do it right. Call an electrician and ask
him to take a look a quote it. A real one, not the amateurs you have asked.
I would not do it in my house, nor would I ever recommend anyone else do so.
How so? The breaker is sized for the wire. On a typical branch circuit
with many outlets you certainly have the potential to draw more than
the wire is rated for-that's what the breaker is for.
Key word POTENTIAL
The wire is rated for 30 amps, but the ovens can pull 33. Will the breaker
take care of that? Some breakers can tolerate a little overage for a
period of time. Is every breaker perfect? Do you want to take that chance?
Wire and breakers are supposed to be sized at 80% actual use, not 110%.
Look at the statistic. Most house fires caused by faulty wiring are where
something has run for a long period of time. Plug in a 5 hp motor and you
blow the breaker or fuse. No serious damage done and you find the problem
and fix it. Plug in that space heater and let it run for a few hours, then
you have the problem. The heat is building over time.
As you point out, a branch circuit is sized for the wire, but has the
potential for many connections. Usually, those connections are not running
all the time.The purpose if a double oven is to use both at the same time.
Agreed-in no way am I suggesting the existing circuit should be used.
It needs to be rewired. My point was that a normal residential branch
circuit also has the POTENTIAL for being overloaded much higher than
the circuit is rated for (other kitchen appliances for instance)
Heh-I've seen some "real" ones that are worse than amateurish in their
But he needs to find one that's experienced in remodel work more than
new construction. A few fish tapes, some pull rope, lube, and a great
sense of direction can make short work of it...
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