Lightning Protection When The Tuner Is Installed In A Building - Acom 04AT Operating Manual

outdoor antenna/s, in order to ensure that your installation
complies with all applicable requirements. The applicable
standards and local regulations shall prevail if there is
a difference in the requirements, and if they contain more
or stricter requirements than the minimum for installation
stated in Appendix 1. NEVER underestimate the danger
of lightning!

1.5.1 Lightning protection when the tuner is installed in a building

For details about lightning protection see Appendix 1
at the end of this manual.
1.5.1.1 The tuner's terminal labeled GROUND
should be connected through a low-impedance connection with a cross section of
no less than 20 sq. mm (preferably flat-shaped and solid – band or plate, rather than
with a flexible multistrand cable), to the main grounding plate of the radio station
(Appx.1-9).
1.5.1.2 The antennas
should be connected by coaxial cables buried in the ground (when coming in from the
field) or securely attached to the wall of the building (when coming down from the roof),
all along the route from the antennas to the foundation of the building where, before
entering, are discharged from the lightning charges in a safe way – directly into the
ground. For this purpose, the braids of the coaxial cables should be securely ground-
ed by a low-impedance connection to the main grounding plate of the building
(Appx.1-8).
1.5.1.3 From a low point close to the foundation of the building,
before going up to the radio station, the wires of the antenna cables should be equipped
with pulse overvoltage limiters (surge arresters), the grounding terminals of which
should be connected through a low-impedance connection to the main grounding
plate of the building (Appx.1-8).
When installing the tuner in the shack, do not connect an-
tenna cables to the tuner if they are entering the building
directly, without being grounded through a low-impedance
connection to the main grounding plate of the building!
Properly grounded antennas shall be guided to the shack
from the inside and from below, from the foundation of the
building and its main grounding plate rather than directly
from outside! (Appx.1-8).
WARNING HIGH VOLTAGE
WARNING HIGH VOLTAGE
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