I ran the sub panel, which has slots for 2 breakers, from a 40amp dual pole breaker which was used to run an old pool pump using the existing wire which is "AWG 12 cu2 CDR with AWG 12 ground type UF-B 600 volts" the distance is about 75 feet. Additionally, I have the sub panel set up to run two 110 20amp breakers. Thanks in advance for any additional help