I have an existing AC unit that hooks up to a 3 wire 240V 30amp disconnect box serviced by a 30 amp two pole breaker. I am adding a small 120V two wire mini split AC right next to it and I would like to use the existing 240v circuit. The mini split requires a minimum 15 amp circuit with a 20amp fuse.
Would it be possible to add a second disconnect box and daisy chain one of the live 120V wires and the neutral from the existing box over to the new box?
I will not use the existing AC and the mini split at the same time ever, but I do not want to replace the existing 30amp disconnect because I do run the existing AC once or twice a year for maintenance purposes. I would disconnect the existing AC the majority of the time.
Is this feasible? Is there an easier/better way?