PMP 450 Planning Guide
) and the equipment room is several floors below (
). The following additional requirements must
be observed:
•
The AP must be below the lightning terminals and finials.
•
A grounding conductor must be installed around the roof perimeter, to form the main roof perimeter lightning
protection ring.
•
Air terminals are typically installed along the length of the main roof perimeter lightning protection ring
typically every 6.1m (20ft).
•
The main roof perimeter lightning protection ring must contain at least two down conductors connected to the
grounding electrode system. The down conductors should be physically separated from one another, as far as
practical.
pmp-0047 (March 2014)
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Summary of Contents for PMP 450
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