Measurement
The total electrical resistance should measured us-
ing testing unit suitable for this purpose (DC source,
10 measuring current). A
connection the earthing system capable with-
standing lightning current must also executed, at
least the main earthing rail. this case, recommend the erection of
an external conductor. This requires exact coordination.
TBS
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Chapter The external lightning protection system
. Earthing
fixed points should used connection points for
down-conductors and the equipotential bonding.
Here grid widths and are recom-
mended. Production must be
checked and documented photographs. The down-conductors must be
routed sections.
With systems made prefabricated concrete and pre-
stressed concrete sections, the electrical continuity
must checked with continuity test between the
top section and the earth.
Two types measurement must carried out:
• The resistance the connection point the rein-
forcement the next connection point should <
10 mΩ
• The connection point the reinforcement with the
main earthing rail should not exceed per
metre building height.
The connection points must created carefully with
clamp connectors.TBS
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Example: use reinforced concrete supports/ down-
conductor system
Down-conductor grid width m
Reinforcement mesh width m
Example: use reinforced concrete supports/ down-
conductor system
In building structures with reinforced concrete sup-
ports walls, the down-conductors must routed in
the reinforcement. Exact
specifications are required for the manufacture the
reinforced concrete elements. building structures made of
prefabricated concrete sections, the electrical continu-
ity the steel reinforcement the individual prefab-
ricated concrete sections with the neighbouring pre-
fabricated concrete sections must guaranteed. the natural down-con-
ductor also optimised protection against
LEMP (lightning electromagnetic impulse), corres-
ponding grids within the system should realised. The down-conductors must also be
additionally connected the reinforcement.
Continuous reinforcement the building structure
If the reinforcement reinforced concrete the build-
ing structure being used natural down- con-
ductor, must joined the air termination system
using lightning protection connection components in
accordance with IEC 62561-1 (DIN 62561-1).
Reinforced concrete elements are ideally suited a
down-conductors system, provided that this use in-
cluded the planning process good time. these values are not achieved,
then the steel reinforcement may not used a
conductor.
Tests should ideally carried out before and after
filling with concrete
