The recommended approach is to use a separate DC grounding electrode for PV arrays and frames, as this enhances protection against lightning and transient voltage. For lightning protection associated with grounding systems, refer to NFPA 780 and NEC 250.
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112 provides a set of practical procedures related to the lightning protection, earthing and bonding of radio base stations (RBSs).
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Always use #6 AWG bare copper wire for outdoor grounding to meet National Electric Code requirements and pass inspections.
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The specific neutral grounding method chosen by the utility can have significant impacts on reliability of service, safety, protection coordination, power quality, equipment ratings among many others.
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