2023 NEC TX
Not exactly sure what you are looking for so check out Article 430 Part X Adjustable-Speed Drive Systems Section
Also, 430.120 General. Part I through Part IX are applicable unless modified or supplemented by Part X.
What kind of demand factor are you seeking?
Do you want to size the circuit conductors?
For sizing conductors for most motors such as 430.122 (A) Branch/Feeder Circuit Conductors. Where you would Apply 125 % of the Code current found in the tables, so this is not a demand factor, as such, but rather an increase.
A demand factor(s) is usually a reduction based on a certain percentage.
So you should also see Part I through Part IX for modifications or supplemented.
TX+MASTER#4544
