Greetings
kindly see the attached.its shows a daisy chain connection for the
three motors.the motor ampacity and wire size based on the ampacities
is written on the attachment.
let me know if the correct ampacity is being used for sizing the wires.
Thanks
If the circuit you are proposing is EXACTLY as shown in that sketch, it cannot be done that way at all, so discussing the ampacity of the wires is pointless.
Each motor circuit must have:
A) Branch short circuit and ground fault protection, sized per article 430.52 for each motor circuit. If the one breaker manages to fit the rules for any one individual motor and yet still allow all three to start, you might get away with it, but at that size, I seriously doubt it.
B) Motor thermal overload protection, sized per 430.31 for each individual motor. That then also implies some way to disconnect power to the motors. You can use one upstream device, but it will of course disconnect all devices connected to it. The motors might have internal thermal overload protection built-in, but at that size and 3 phase, not likely.