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Concrete
Connection for the LPS,
e.g. StSt (V4A, material
No. AISI/ASTM 316 Ti) Wall / earth electrode bushing
Part No. 478 410
Soil

Main earthing busbar (MEB)
Maximum ground water level Part No. 563 200

Connecting clamp
Part No. 308 025
Cross unit
Part No. 319 209 Tank sealing Foundation slab

Functional equipotential bonding conductor Blinding layer
Corrosion-resistant ring earth electrode, StSt (V4A) (e.g. material No. AISI/ASTM 316 Ti)
Max. mesh size of the ring earth electrode of 10 m x 10 m

Figure 5.5.2.19 Arrangement of the earth electrode in case of a “black tank” according to the German DIN 18014 standard

Figure 5.5.2.20 Ring earth electrode in case of perimeter insulation; Figure 5.5.2.21 Detailed view of a ring earth electrode; source:
source: Company Mauermann Company Mauermann

bridges and additionally protects the sealing from mechanical on the earth resistance of foundation earth electrodes which
damage (Figures 5.5.2.20 and 5.5.2.21). are conventionally installed in the foundation slab. A resistivity
The resistivity of the perimeter insulation boards is a decisive of 5.4 ⋅ 10 Ωm is specified for e.g. polyurethane foam with a
12
3
factor when considering the effects of the perimeter insulation density of 30 kg/m . The resistivity of concrete, in contrast, is

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