General Protection Requirements; Figure 2-1 Rolling Sphere Method To Determine The Lightning Protection Zones - Motorola PTP 250 User Manual

Grounding and lightning protection

Figure 2-1 Rolling sphere method to determine the lightning protection zones

Assess locations on masts, towers and buildings to determine if the location is in Zone
A or Zone B:
x
Zone A: In this zone a direct lightning strike is possible. Do not mount equipment
in this zone.
x
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

General protection requirements

Apply the practices and procedures detailed in manual
For Communication Sites
to all new site build activities.
2-12
Never mount equipment in Zone A. Mounting in Zone A may put
equipment, structures and life at risk.
(available for download at www.motorola.com/ptp/software)
Chapter 2 Planning considerations
R56 Standards And Guidelines
phn-2182_002v000
May 2011