3 White trough
The white trough construction consisting water-
impermeable concrete, i. func-
tional equipotential bonding cable must created in
the foundation.e. Connection lugs must routed into
the building such way that they are resistant to
pressurised water above the maximum groundwa-
ter level. 1.4.
2.4. concrete cladding used corrosion
protection
White trough
TBS
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161
Chapter The external lightning protection system
. 1.4. Concrete of
grades such C20/25 C25/30 considered wa-
ter-impermeable concrete.50 m
Maximum groundwater level
Ring earth electrode
Blinding layer
Spacer
Min.4.50 m
Maximum groundwater level
Ring earth electrode
Blinding layer
Spacer
Min. water cannot penetrate
right through the concrete. concrete cladding used corrosion
protection
Black trough
Connection lug, min. Because the foundation
earther longer has contact with the earth here, an
additional grid ring earther must created.2 Black trough
The black trough bitumen plastic seal sur-
rounding the structure all sides the area which
it contact with the earth.
Connection lug, min.TBS
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2. Because the foundation
earther longer has contact with the earth here, an
additional ring earther must created
