Within a building or other structure, the X2 common-node connection of the wye-connected secondary of a 3-phase transformer is ___

Within a building or other structure, the X2 common-node connection of the wye-connected secondary of a 3-phase transformer is normally _______________ to create a 3-phase AC, 4-wire electrical power distribution.

A) grounded
B) bonded
C) isolated
D) insulated

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Answer:A

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