[Sanj]

Recently had a new GE French door oven installed.....they changed the breaker from a double 40 breaker to double 30 breaker.....my oven has been used about four times with no problems. Just now fired it up and it tripped the breaker twice but let me reset and then worked properly again....any ideas what would cause this?

 

[Jim Port]

What size circuit does the unit call for?

 

[jimn]

Electric oven? Why would they change the breaker size? Breaker protects the wiring so it should be sized to the wire not the appliance . Who did the install? Check the manual for the oven and see what it says about electric supply .

 

[Sanj]

It is an electrical oven....the manual for the ovens calls for 30 Amp....I hired a local handyman to do the install. He said if I left the 40 amp breaker in there was a chance the oven would draw too much electrical current and damage oven.

 

[Jim Port]

A too large breaker cannot cause anything to draw more power.

The breaker tripping indicates a problem with the install or the unit.

 

[dmxtothemax]

Put the 40A breaker back in !
Then see what happens ?
If the 30A breaker is running
close to its limits,
it can cause nuisance tripping.

 

[MrElectricianTV]

Recently had a new GE French door oven installed.....they changed the breaker from a double 40 breaker to double 30 breaker.....my oven has been used about four times with no problems. Just now fired it up and it tripped the breaker twice but let me reset and then worked properly again....any ideas what would cause this?

Can you post a link to the oven and the installation instructions?

 

[Sanj]

http://products.geappliances.com/appliance/gea-specs/CT9070SHSS

 

[rjniles]

Your oven calls for a 20 amp breaker. If you are tripping a 30, either the breaker is bad or the oven is bad. Are you sure nothing else is connected to this circuit ( like a cook top)?

 

[Sanj]

i will turn off breaker and see if it turns anything else off and report back

 

[carmusic]

maybe also loose wire that is very close to ground and sometimes shorts to frame when oven is turning on (very small vibration from current in wires)

 

[Sanj]

The tripping has only occurred when I had the oven set to 475 degrees

 

[dougp23]

Man those specs...
20 Amps
2850 Watts (Yikes)
4300 Watts for the broiler (double yikes)

I'm no master electrician but holy crap...those kind of watts on a 20A breakers?? Even two of them for 40A, aren't you only supposed to load like 80 percent? Which would put you right at those limits?

 

[MrElectricianTV]

Man those specs...
20 Amps
2850 Watts (Yikes)
4300 Watts for the broiler (double yikes)

I'm no master electrician but holy crap...those kind of watts on a 20A breakers?? Even two of them for 40A, aren't you only supposed to load like 80 percent? Which would put you right at those limits?

My math came up with a little less than 18 amps. A 30 amp breaker is fine.

 

[danpik]

In the manual I see 4 different oven sizes listed with different power requirements for all 4 (20A, 30A, 40A and 50A) Which model oven do you have?

 

[Protocol.]

Pull off the specific model and serial of your unit installed. That will tell us what you have exactly.

You can't forget the convection motor will also draw a couple amps.

Why not get a clamp meter and clamp the breaker to confirm amperage? Once you've figured out exact wattage it will be easy to tell if there is a discrepancy.

 

[Sanj]

I have model CT9070SH1SS

 

[joed]

The install says a 20 amp 240 volt circuit. So If it is tripping that circuit then I would say something is wrong with the oven. There is a slight possibility that the breaker is defective.

 

[rjniles]

Did you try turning the breaker off and see it that kills the cooktop?

 

[TimPa]

i would not recommend that you put the 40 a cb back in, without knowing what other components the installer placed in the circuit (Connectors, pig tail/supply cords, etc.). they may be rated at 30 a or ??