This method should therefore only used where the
building already protected with air-termination rods
whose positions were determined using the rolling
sphere grid method.2 Protective angle method
Using the protective angle method only advisable in
simple small buildings and for individual sections of
buildings.1.1.
If the roof structure has conductive continuation into
the building (e.TBS
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Protective angle
Separation distance
Protective angle and separation distance air-termination rods photovoltaic system
2. The protective angle method
is well suited determining the positions air-termin-
ation rods providing merely additional protection for a
small number protruding building parts struc-
tures. Here necessary observe the relevant
separation distance (“s”) between earthed roof struc-
tures and metal systems.
Using the protective angle method
is only advisable simple small
buildings and for parts build-
ings. This distance safely prevents arcing the
lightning current and dangerous spark creation.
All roof structures must protected with air-termina-
tion rods.g. with stainless steel pipe with a
connection the ventilation air-conditioning sys-
tem), then the air-termination rod must erected a
separation distance (s) from the object pro-
tected.
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63
Chapter The external lightning protection system
