Variable Frequency Drive, 7.5HP, 400-480V

so I've got plans for wiring up how I'm gonna do this i've got wire that i had on-site had a giant coil of this may be as much as 100 feet of it it's quite a bit and it's really heavy stuff not sure exactly I'll take some measurements of it right now I'm just kind of going over the general plan there's an existing 50 amp breaker that's right outside and then this goes up into the attic so the most ideal situation I would like to have an a/b circuit switch that interrupts this guy here so I'd have it come in here and then a would power this 50 amp and then B is going to come in to inside the shop and run over to 30 amp and a 20 amp so then the 20 amp can go to my smaller new HP VFD and off to the Bridgeport and the 30 amp then go to my 10 horsepower VFD which would then go to sorry I am terrible at drawing but I love doing it so it's kind of weird huh the closing so this 50 amp breaker o