How can I replace a 30amp Oven and Cooktop with a 40 amp range? The cooktop was powered by 10/2wg 30 amp double pole breaker. The oven by 10/3wg 30amp double pole breaker. Can I use both conductors to carry the 40 amps and replace breaker with 40amp or should I just use the 10/3wg and leave the 30 amp breaker?[:-censore Access to run wire to box is not possible since box is outside and on finished wall. Please help!! Thanks Chris[:-alien]