How does my system receive power?Updated 10 hours ago

Mini splits receive power from the outdoor unit only. Indoor units that connect to outdoor units receive power from the outdoor unit via the communication cable connecting them together.

In order to comply with the National Electrical Code (NEC) in most areas, the outdoor unit must be hard-wired to a dedicated circuit breaker using fuses with proper amperage and corresponding rated wire. We also recommend using a disconnect box and surge protector when hard-wiring the outdoor unit to a dedicated circuit breaker.

All systems use 3-conductor wire. The 110/120 (115V) systems are powered as line, neutral, and ground (typically colored black, white, and green). The 208/240 (230V) systems are powered with two hot lines (black and red) and a green ground - no neutral is used.  

Note: The 115V systems require a single-pole breaker, while 230V systems require a double-pole breaker. Tandem breakers do not work for these systems.

The Central (Ducted) Split systems are always 230 VAC and require hardwiring both the outside condensing section and indoor air handler unit to a dedicated breaker.