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TIP :- When installing an Omni antenna on the rooftop - remember it
can be a target for any local lightning activity, a direct strike or
energy from a local strike in the area can be absorbed into the
omni,cables and mast.
ENSURE this mast is EARTHED at all times, A cable from the bottom of
the metal mast heading down to an earth point such as a rod driven
into the ground makes a good lightning protection system. Lightning
follows a direct path to earth in most cases, no bends in the earthing
cable. Fit a surge arrestor in line with the cable to protect your
Access Point equipment. Remember to earth this surge arrestor as well
to your earth system.
Check out http://www.techno.net.au/wireless/earthing for my setup on
NodeABJ [1]
Ernie
Links:
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[1] http://melbournewireless.org.au/?NodeABJ
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