Need to match breaker size to oven amps?
Looking at the installation instructions for your model on the GE web site the power requirements show 240 volts at 7200 watts 30 amp branch circuit.
However the installation instructions say the oven comes 4 wire and requires a neutral , showing an appliance whip with red, white, black and green ground.
Do you have four wires in the existing branch circuit to connect the oven 4 wire power cord?
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