Lightning protection guide by OBO

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Last revision 2020

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

Strana 169 z 288

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Corrosion is when metal material reacts with its surroundings to the detriment the material’s properties. steel earth and 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. The minimum cross-sections, shape and material depend the appropriate application. alu- minium round conductors arrestors and copper- /steel earthing material.08% (b) Diameter can certain applications reduced mm2 (diameter mm) mechanical resistance not primary criterion.5 mm Rustproof steel (a) Strip solid 2.7 Materials and corrosion protec- tion The following materials are preferred for use extern- al lightning protection systems: Hot galvanised steel, rustproof steel, copper and aluminium. Material Form Minimum dimensions Copper, tin-plated copper Strip solid 2.5 mm Round, solid mm Cable (b) mm² Round, solid mm Copper-coated steel (c) Round, solid mm Strip solid 2. Causes corrosion Corrosion occurs when different metals are connected with one another soil, water molten salt, e.5 mm Round, solid mm Cable (b) mm² Round, solid mm Hot galvanised steel Strip solid 2. can also occur when a single type metal embedded two distinct envir- onments, e.g.5 mm Round, solid mm Cable (b) mm² Round, solid (d) mm (a) Chromium 16%; Nickel 8%; Carbon 0.27: Material, form and minimum dimensions air-termination cables, air-termination rods, earth entry rods and conductors TBS Blitzschutz-Leitfaden 2018 / en / 2020/01/10 14:42:40 14:42:40 (LLExport_02613) / 2020/01/10 14:42:54 14:42:54 169 Chapter The external lightning protection system .9% copper content (d) Can used for air-termination rods and base Table 2. (c) least copper plating with 99.5 mm Round, solid (b) mm Cable (b) mm² Round, solid mm Aluminium Round, solid mm Cable mm² Copper-coated aluminium alloy Round, solid (c) mm Aluminium alloy Strip solid 2. All metals in direct contact with the ground water can corrode due stray current aggressive soils.g