Multiple Motor Circuit Wire Size-Terminals Issue

[32Lateralus]

Let's say we have 4 motors to be put on a circuit. 2x 10hp(14A), 2x 5hp(8A).

FLA: (14*1.25)+14+8+8 = 47.5A


1. Is OCPD for combined circuit 50A. Wire size #6?
2. Now when looking at combination fused disc/starters for the 5hp motors, we are NEMA 0 size. When I looked up the terminals, they only take up to #8 wire. If we are required to keep the #6 throughout, how do we typically land on disconnects for the smaller motors? Is some sort of reducer allowed?

 

[LarryFine]

How are the single circuit conductors physically divided among the four loads?

 

[32Lateralus]

How are the single circuit conductors physically divided among the four loads?

Im not sure Im following. It's hypothetical, so I assume the feed from the OCPD would tap off to the 4 loads at the location of the motors?

 

[LarryFine]

Im not sure Im following. It's hypothetical, so I assume the feed from the OCPD would tap off to the 4 loads at the location of the motors?

I'm suggesting that the conductors to each load can be reduced where they are joined to the main ones.

Do the individual loads each have over-current protection?

 

[32Lateralus]

I'm suggesting that the conductors to each load can be reduced where they are joined to the main ones.

Do the individual loads each have over-current protection?

Ah, okay. Yes, one feed comes in and splits to all 4 loads.
Yes, each load has a fused disc/starter for over-current and overload protection

 

[LarryFine]

Yes, each load has a fused disc/starter for over-current and overload protection

Then each motor's conductors only need to be sized for that one motor. See 'tap rules.'

 

[augie47]

The math you showed in the original post is correct for selecting the ampacity (conductor size) of the feeder.
For the feeder OCP see 430.62
It's basically the largest OCP + FLA of other loads.