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. Also used to ...

A standard 30-amp branch circuit will have adequate capacity to supply electricity continuously and safely for the space heater. How To Work Safely on Your Home’s Electrical System ...