800 hp motor

[howeng]

sanity check-do the provisions of 240.4(C) apply to motors?

 

[jumper]

No. Motors are 240.4(G) which takes you to 430.

 

[augie47]

no, due to 240.4(G) listing Art 430. OCP for motors is per Art 430.

(sorry jumper, posted at same time..but at least in agreement)

 

[jumper]

Looking again, I think I should have wrote:

Motor OCPDs are 240.3.

Motor conductor OCPDs are 240(G).

Both take you to 430.

 

[templdl]

sanity check-do the provisions of 240.4(C) apply to motors?

Think about it, what would the FLA be at 480v. Would it be practical. Even the windings of the motor we would be impractical to wind at best because of the huge wire gauge that would be required.
Your are probably looking at a 2300 or 4160v motor.