Sizing conductors and OCPD for a VFD

[JS-Addis]

When sizing the conductors for a VFD the motor circuit conductors, conductors feeding the VFD, is sized 125% greater than the rated input amps of the VFD. The secondary conductors, conductors feeding the motor, is sized according to 430.6 (A)(1). Finally, the OCPD is it sized according to table 430.52, according to the VFD manufacturer's recommendation, or 125% greater that the input rating on the VFD?

 

[petersonra]

The conductors feeding the VFD are sized at 125% of the FLA of the drive input.

The output conductors are sized as any other motor branch circuit.

The VFD OCPD can be sized upto 250% unless the drive manufacturer says it is less.

 

[JS-Addis]

Thanks for the help Bob.