935.1524/F/1205/8.8e/SKS Subject to technical changes.
c) Routing of grounding conductors
Ȝ Antenna cables and grounding conductors must not
be routed through rooms used for storing easily in-
flammable substances (hay or straw, for example) or in
which an explosive atmosphere can develop (gases,
vapours).
Ȝ If the parabolic antenna is used in integrated antenna
systems (e. g. distribution systems), the grounding
measures must also be designed in such a way that
grounding protection is still maintained if individual
units are removed or replaced.
7. Antenna grounding / Lightning protection
The antenna must be grounded as is required by standard
DIN EN 50083-1. The only external antennas exempted
from this are those:
– fitted more than 2 metres below the crest of the roof
– whilst also less than 1.5 metres from the building.
However, for safety reasons Kathrein recommends to
mount a potential equalisation device.
Danger can arise not just from thunderstorms (lightning
strikes) but also through static charge accumulation or
discharge in the devices attached:
Ȝ Consequently, the mast and the external conductor of
the antenna cable must be connected to the building’s
lightning conductor system taking the shortest path
vertically via a suitable grounding conductor (or to the
building’s grounding system if no lightning conductor
system is available).
a) Suitable as grounding conductor:
– a single solid wire with a min. cross-section of at least
16 mm
2
for copper, 25 mm
2
for aluminium or 50 mm
2
for
steel
– or metallic domestic installations (continuous metallic
water or heating system pipes, for example) provided
that they at least meet the requirements for grounding
conductors in terms of cross-section and permanence
of the electrical connection.
b) Not suitable as grounding conductor:
– the external conductors of the antenna cable
– or the grounding conductor or neutral conductor of the
power system
Attention!
Due to the danger of inadequate results from groun-
ding and lightning conductor work, only electricians
with the requisite specialised training must undertake
this!
Ȝ Never undertake grounding and ligthning conductor
work yourself unless you are a specialist with the
necessary know-how!
The instructions supplied here are not an invitation to
non-specialists to take responsibility for carrying out
grounding and lightning conductor work themselves,
but serve as additional information for the specialist
engaged by them.
KATHREIN-Werke KG · Anton-Kathrein-Straße 1–3 · Postfach 10 04 44 · D-83004 Rosenheim · Deutschland · Telefon (0 80 31) 18 40 · Telefax (0 80 31) 18 43 06
Grounding
conductor
Grounding
connection
Equipotential bonding
strip
Mains
connection
230 V
Equipotential
bonding conductor
Equipotential
bonding
conductor
Equipotential
bonding strip
Grounding the antenna
installed in the hatched
area is not explicitly
required by standard.
