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An installer is hired to troubleshoot a 10-year-old roottop system with open-circuit voltage of 300V.

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An installer is hired to troubleshoot a 10-year-old roottop system with open-circuit voltage of 300V. The ground-fault detection (GFD) device has tripped. The insulation on the exposed source circuit cables has deterlorated with multiple cracks and has no flexibility. Which concern is the MOST likely safely issue when servicing this array?

A.

Insulation has become an electrical conductor since it has changed its composition.

B.

Cracked insulation has allowed water intrusion that resulted in oxidation of the copper conductors.

C.

Ungrounded conductors are conducing current event the ground-fault device has activated.

D.

Short-circuit current is present at the PV source-circuit terminals of the disconnect device because of electrical leakage.

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