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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4.4. Because the foundation earther longer has contact with the earth here, an additional grid ring earther must created. 2.4. func- tional equipotential bonding cable must created in the foundation.2 Black trough The black trough bitumen plastic seal sur- rounding the structure all sides the area which it contact with the earth. concrete cladding used corrosion protection Black trough Connection lug, min. Because the foundation earther longer has contact with the earth here, an additional ring earther must created. 1.4. Concrete of grades such C20/25 C25/30 considered wa- ter-impermeable concrete.e. 1. water cannot penetrate right through the concrete.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. 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 .3 White trough The white trough construction consisting water- impermeable concrete, i.50 m Maximum groundwater level Ring earth electrode Blinding layer Spacer Min. Connection lug, min. Connection lugs must routed into the building such way that they are resistant to pressurised water above the maximum groundwa- ter level.50 m Maximum groundwater level Ring earth electrode Blinding layer Spacer Min