I am installing a service for an electric stove and went to Lowes and told them I needed 55' of 3-wire for a stove service. What they sold me contained 2 6-gauge wires with a 12 gauge ground. I now looked in my daughters breaker panel and see that her stove service contains 3 6-gauge wires (not 4-wire). Can the 2 6-gauge wire with a 12-gauge ground be used for a stove service?