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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This Recommendation addresses the practical procedures concerning the lightning protection, earthing and bonding of radio base station (RBS) sites.
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To properly protect the power line of a base station, the line entering the building should use a cable with metal cladding, buried underground. Cable without metal cladding should be shielded by a steel pipe, whose both ends.
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The lightning protection grounding system comprises a lightning rod, a grounding down lead, grounding bodies and a tower mast which is used for supporting the lightning rod and the machine room of the communication base station.
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