I’m installing a 5 zone 9k btu mini split and I’m not sure where to start with the wiring. Looked in the manual there’s a few different ways. I was hoping to use one box for my upstairs units (2) put the disconnect in central location. And hopefully the same with the two on the first level and I plan to put one in the basement which I assume would be good to wire straight into my box. More than likely going to hire a professional but id like to at least give it a try. Thanks for the information!!
You don't say where you live, but in New Hampshire the chief electrical inspector for the state ruled in 2015 based on NEC 2014 that each indoor unit needs its own disconnect so that it may be serviced safely. The outdoor disconnect for the outdoor unit, which supplies power to all parts of the system, is not in line of sight of the indoor units so it does not qualify as a disconnect for them.
A disconnect may be mounted on the wall near the indoor unit or an in-line touch-safe plug (similar to a luminaire disconnect) may be installed in the wiring box within the case of the indoor unit. The only inline plug that was approved as of 2015 was the Ideal 103G. This plug is UL listed for NEC 410.130G compliance, which has nothing to do with air conditioners, but that was how the chief inspector ruled.