The lightning current distributed through the metal
grid system and the voltage drop and the resulting
step voltage are reduced.6 Potential control
The potential control reduces the step voltage close to
rods down conductors building.5 m). Additional
earth conducts are laid and connected with one an-
other grid format.
The earthers are typically laid apart. the distance from the
rod down-conductor increases, the depth the
earther cable also increases (in increments 0.TBS
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2.
Earthing voltage UE
With potential control
Without potential control
Potential control street-light pole
TBS
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Chapter The external lightning protection system
