Cambium Networks cnReach N500 Handleiding (253 Pagina's)

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cnReach N500 User Guide

InstallationSafety

phn-4673_002v000 (March 2018)

5-3

Note

International and national standards take precedence over the requirements in this guide.

Lightning protection zones

Use the rolling sphere method (see figure below) to determine where it is safe to mount equipment. An

imaginary sphere, typically 50 meters in radius, is rolled over the structure. Where the sphere rests

against the ground and a strike termination device (such as a finial or ground bar), all the space under

the sphere is considered to be in the zone of protection (Zone B). Similarly, where the sphere rests on

two finials, the space under the sphere is considered to be in the zone of protection.

Rolling sphere method to determine the lightning protection zones

Zone A: In this zone a direct lightning strike is possible. Do not mount equipment in this zone.

Zone B: In this zone, direct EMD (lightning) effects are still possible, but mounting in this zone

significantly reduces the possibility of a direct strike. Mount equipment in this zone.

Warning

Never mount equipment in Zone A. Mounting in Zone A may put equipment, structures

and life at risk.

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