As noted in another thread, VFD
controller inlet conductor sizing must be no less than 1.414 times FLA unless line reactors are used. NFPA-20 requires a minimum of a 5% line reactor; but, some vendors are using "swinging chokes", like what used to be used in radio power supplies. As a result, the wiring requirements of the controller must be according to the requirements or recommendations of the VFD manufacturer
and/or the fire pump controller manufacturer.