Lightning protection guide by OBO

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Last revision 2020

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

Strana 161 z 288

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50 m Maximum groundwater level Ring earth electrode Blinding layer Spacer Min.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 2. water cannot penetrate right through the concrete.4. 1. Connection lug, min. Concrete of grades such C20/25 C25/30 considered wa- ter-impermeable concrete.4.4. concrete cladding used corrosion protection White trough TBS Blitzschutz-Leitfaden 2018 / en / 2020/01/10 14:42:40 14:42:40 (LLExport_02613) / 2020/01/10 14:42:54 14:42:54 161 Chapter The external lightning protection system . concrete cladding used corrosion protection Black trough Connection lug, min. 1.3 White trough The white trough construction consisting water- impermeable concrete, i.e. Because the foundation earther longer has contact with the earth here, an additional ring earther must created. func- tional equipotential bonding cable must created in the foundation. Connection lugs must routed into the building such way that they are resistant to pressurised water above the maximum groundwa- ter level. Because the foundation earther longer has contact with the earth here, an additional grid ring earther must created.4.2 Black trough The black trough bitumen plastic seal sur- rounding the structure all sides the area which it contact with the earth.50 m Maximum groundwater level Ring earth electrode Blinding layer Spacer Min. 2