5.3 Grounding and Lightning Protection
Consult local electricity professionals for the local and state legislation
and regulations about grounding.
WARNING!
Ground the product and verify outdoor installation grounding
periodically. Failure to provide proper grounding can result in injury or death from
electrical shock and can severely damage the equipment.
WARNING!
Lightning protection is required to prevent injury and damage to
equipment due to direct lightning strikes and lightning-induced current surges.
WARNING!
Ground remote units properly. A lightning strike through a
communication wire can cause a lethal current surge.
WARNING!
A long cable between units (sensors, transmitters, power supplies, and
displays) can cause a lethal lightning-induced current surge. Always ground the
enclosure to a suitable grounded location with a short, low-resistance cable.
WARNING!
Do not perform installation or maintenance procedures when there is a
risk of thunderstorm or lightning activity in the area.
WARNING!
To prevent equipment damage, install an air terminal so that the tip is as
high above the instruments and sensors as possible.
CAUTION!
Vaisala recommends an air terminal for all mast structures that reach 10 m
(32 ft 10 in). For mast structures that reach 6 m (19 ft 8 in) or lower, an air terminal is
recommended in regions with high lightning density. Especially in tropical or sub-tropical
regions, a lightning protection system is a necessity.
CAUTION!
Chapter 5 – Mast Installation
37
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