Short-circuit calculations must be submitted for systems with an aggregate generating capacity of 1500 kilowatts or more by utilizing one of the following methods:
(a)Exact calculations using actual impedance and reactance values of system components.
(b)Estimated calculations using IEC 61363-1:1998 for AC systems and IEC 61660-1:1997 for DC systems (both incorporated by reference; see § 110.10-1 of this subchapter).
(c)The estimated calculations using a commercially established analysis procedure for utility or industrial applications.
(a)Exact calculations using actual impedance and reactance values of system components.
(b)Estimated calculations using IEC 61363-1:1998 for AC systems and IEC 61660-1:1997 for DC systems (both incorporated by reference; see § 110.10-1 of this subchapter).
(c)The estimated calculations using a commercially established analysis procedure for utility or industrial applications.