Low energy-draw fixtures like lights and bedroom outlets will use 14 American Wire Gauge (AWG) with 15 amp circuits. 12 AWG wire will be used with 20 amp circuits to provide a bit more power to ...

10-gauge wire . Appropriate for a two-pole 20-amp breaker or a single-pole 30-amp breaker. 8-gauge or 6-gauge wire . Used for 40-, 50- and 60-amp two-pole breakers; large appliances.