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tor must be installed vertically in a straight line and must have
2
2
a cross-section of at least 16 mm (copper), 25 mm (insulated
2
aluminium) or 50 mm (steel) (Figure 9.5.8). The connections
of the equipotential bonding conductor, for example to pipe
clamps and equipotential bonding bars, must be dimensioned
for lightning currents and tested to IEC 62561-1 (EN 62561-1).
The equipotential bonding conductor must be installed as far ...
as possible from conductors and earthed systems since in case
of a lighting strike the same physical interactions occur that
must be observed for keeping the separation distance in an
external lightning protection system. In addition, natural com-
ponents of the building / installation may be used as earthing terminal
conductor if they are permitted, electrically conductive and amplifier block
have the same dimensions as standard earthing conductors.
Also in this case, equipotential bonding must be established building entrance
facility
as described before, however, without connecting the lowest
point of the cable shields to the main earthing busbar (Figure
2
9.5.8). 4 mm Cu
MEB
The DEHNcon-H solution where the high-voltage-resistant,
insulated down conductor is routed to the earth-termination
system provides more effective protection from the effects of
a lightning strike than earthing the antenna mast. The connec-
tion at the mast is made via the existing protective bonding No. Surge protective device Part No.
conductor (Figure 9.5.9). DEHNgate DGA GFF TV 909 705
Building with broadband cable connection DEHNgate DGA FF TV 909 703
If a broadband cable enters the building, lightning strikes DEHNflex DFL M 255 924 396
are to be expected. Therefore, only lightning current carrying
surge protective devices such as DEHNgate GFF TV are used Figure 9.5.10 Broadband cable connection with surge protective
(Figure 9.5.10). devices

www.dehn-international.com LIGHTNING PROTECTION GUIDE 295