water cannot penetrate
right through the concrete. concrete cladding used corrosion
protection
Black trough
Connection lug, min. Concrete of
grades such C20/25 C25/30 considered wa-
ter-impermeable concrete. concrete cladding used corrosion
protection
White trough
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161
Chapter The external lightning protection system
.4. 1. Because the foundation
earther longer has contact with the earth here, an
additional grid ring earther must created.TBS
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2.50 m
Maximum groundwater level
Ring earth electrode
Blinding layer
Spacer
Min.3 White trough
The white trough construction consisting water-
impermeable concrete, i. 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.e. 1.4.2 Black trough
The black trough bitumen plastic seal sur-
rounding the structure all sides the area which
it contact with the earth.4.
2.
Connection lug, min.4.50 m
Maximum groundwater level
Ring earth electrode
Blinding layer
Spacer
Min. Connection lugs must routed into
the building such way that they are resistant to
pressurised water above the maximum groundwa-
ter level
