Lightning protection guide by OBO

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Last revision 2020

Vydal: OBO BETTERMANN s. r. o. Autor: OBO BETTERMANN

Strana 178 z 288

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Cross-sections must be designed according IEC 62305.The main earthing rail must located the main connection area close the building connections. the lightning protection equipotential bonding, the cables the equipotential bonding must di- mensioned for higher currents. In each building, the earthing cable and the following conductive parts must connected the protective equipotential bonding via the main earthing rail: • Metallic pipelines supply systems • Extraneous conductive parts the building struc- ture • Metallic central heating and air-conditioning sys- tems • Protective conductors within the electrical system • Metallic reinforcements building structures made of reinforced concrete The protective equipotential bonding cables must meet the requirements IEC 60364-441/ IEC 60364- 5-54. Requirement for equipotential bonding: • Must possible isolate con- ductors • Reliable connection • Can only undone with tools Bodies (electrical equipment) Extraneous conductive part (C1, C2, C3, C6, C7) Main earthing busbar Foundation earth electrodes Earth electrodes for lightning protection Lightning protection system Protective conductors (PE) Protective equipotential bonding cable for connection with the main earthing busbar Protective equipotential bonding cable (for the addition- al protective equipotential bonding) Lightning protection down-conductor Earthing conductor Functional earthing conductors for lightning protection Air-conditioning system Heating Metal (waste/drinking) water pipes bathroom Equipotential bonding system building TBS Blitzschutz-Leitfaden 2018 / en / 2020/01/10 14:42:40 14:42:40 (LLExport_02613) / 2020/01/10 14:42:54 14:42:54 178 Chapter The internal lightning protection system