A standard 12,000 BTU (1-ton) ductless mini-split system typically requires either a 15-amp or 20-amp dedicated double-pole breaker, depending on the specific voltage requirements (115V versus 230V) and the manufacturer's exact specifications. Most modern 230V units specify a 15-amp maximum fuse or circuit breaker size alongside 14-gauge or 12-gauge power supply wiring, while certain models or 115V configurations call for a 20-amp breaker paired with 12-gauge wire. It is critical to always check the specific electrical data plate and manufacturer installation manual on the outdoor condenser unit to ensure compliance with local electrical codes and proper overcurrent protection limits.
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