3. If it is not possible to set up conditions of electrical insulation in accordance with article 6.3 of this
standard, we recommend connecting the load-bearing structure at roof level to the external air ter-
mination network via an 8mm diameter FeZn conductor and shielding the data cable before entry
to the building with a grounding kit and CYA 6 mm
2
conductor to the bonding bus, and if not already
set up then also to the external air termination network, see
Fig. 4.21 Grounding installation 2
4. If there is not an external LPS on the building we recommend routing lightning current through an
8mm FeZn conductor to a common grounding system, or to a separate grounding electrode with a
ground resistance up to 10 Ω.
5. For limiting the overvoltage transferred over the data cable and into the building we recommend
fitting surge protection at the interface between zones LPZ 0 and LPZ 1 connected via a CYA 4 mm
2
conductor to the same grounding point as the antenna or the antenna mast.
6. We recommend protecting the PoE power supply from overvoltage on the LV side with suitable
class D surge protection.
RACOM supplies surge protection for installation on Ethernet cables entering buildings. For more details
see
.
Additional safety recommendations
• Only qualified personnel with authorization to work at heights are entitled to install antennas on masts,
roofs and walls of buildings.
• Do not install the antenna in the vicinity of electrical wiring. The antenna and bracket should not
come into contact with electrical wiring at any time.
• The antenna and cables are electrical conductors. During installation electrostatic charges may build
up which may lead to injury. During installation or repair work to parts of the antenna lead, bare
metal parts must be temporarily grounded.
• The antenna and antenna cable must be grounded at all times.
• Do not mount the antenna in windy or rainy conditions or during a storm, or if the area is covered
with snow or ice.
• Do not touch the antenna, antenna brackets or conductors during a storm.
37
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RAy3 Microwave Link – © RACOM s.r.o.
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Installation
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