or facilities to the electric grid, (iii) primarily used for one or more purposes described in subparagraph (d)(1)(A)(ii), and (iv) capable of transmitting electricity at a voltage of not less than 230 kilovolts. (B) Grid enhancing technology Any grid enhancing technology property used in the operation of the electric power transmission line described in subparagraph (A) or (B) of subsection (d)(1). (C) Subcomponents Any conductors or cables, towers, insulators, reactors, capacitors, circuit breakers, static VAR compensators, static synchronous compensators, power converters, transformers, synchronous condensers, braking resistors, and any ancillary facilities and equipment necessary for the proper operation of the electric transmission line described in subparagraph (A) or (B) of subsection (d)(1) or for the proper operation of any property described in subsection (1)(A). (2) Grid enhancing technology property The term grid enhancing technology property means power flow controls and transmission switching equipment, storage technology, and hardware or software that enables dynamic line ratings, advanced line rating management technologies, on new or existing transmission property for the purpose of enhancing the capacity, efficiency, resiliency, or reliability of an electric power transmission system and such other similar property determined by the Secretary, in consultation with the Secretary of Energy. (f) Termination This section shall not apply to any property the construction of which begins after December 31, 2033. . (b) Public utility property Paragraph (2) of section 50(d) of the Internal Revenue Code is amended— (1) by striking (as defined in section 48(c)(6)) and inserting (as defined in section 48(c)(6), except that subparagraph (D) of such section shall not apply) or any qualifying electric power transmission line property (as defined by section 48F(c)) , and (2) in subparagraph (B)— (A) by inserting or qualifying electric transmission line property after each energy storage technology , and (B) by