Trying to replace micro-oven combo with double oven and junction box only has two black wires and a ground. The junction box is hooked to two 40 amp breakers with a single throw, I am confused with junction box on the wire being the same color? Any thought, thanks

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Originally Posted by bufa06

Trying to replace micro-oven combo with double oven and junction box only has two black wires and a ground. The junction box is hooked to two 40 amp breakers with a single throw, I am confused with junction box on the wire being the same color? Any thought, thanks

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What is the color of the wires that are connected to the breakers? If they are both black then you have a straight 240VAC. Have you measured any voltages?What does the new oven require? What are the colors in the J Box?