For PV systems, metallic mounting structures used for grounding purposes must be _____ as equipment grounding conductors or have _____ bonding jumpers or devices connected between the separate metallic sections and be bonded to the grounding system.
d) a and b
See answer and applicable Code reference
The correct answer is: c) identified
The grounding requirements for solar photovoltaic (PV) systems are outlined in Part V of Art. 690. As noted in 690.43(C), "Devices listed and identified for grounding the metallic frames of PV modules or other equipment shall be permitted to bond the exposed metal surfaces or other equipment to mounting structures. Metallic mounting structures, other than building steel, used for grounding purposes shall be identified as equipment-grounding conductors or shall have identified bonding jumpers or devices connected between the separate metallic sections and shall be bonded to the grounding system."