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A ground-fault protection device (GFPD) trips during commissioning.

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A ground-fault protection device (GFPD) trips during commissioning. What is the most likely cause per NEC 690.5?

A.

Open circuit in the array

B.

Reverse polarity in a source circuit

C.

Insulation failure between a conductor and ground

D.

Overcurrent in the inverter output

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