Chapter 5: Installation
228
Figure 85 :
Grounding and lightning protection on mast or tower
Prot ect ion requirement s on a mult i- floor building
If the ODU is to be mounted on a high-rise building, it is likely that cable entry is at roof level (Roof
installation) and the equipment room is several floors below. The following additional requirements must
be observed:
l
The ODU must be below the lightning terminals and finials.
l
A grounding conductor must be installed around the roof perimeter to form the main roof
perimeter lightning protection ring.
l
Air terminals are typically installed along the length of the main roof perimeter lightning protection
ring typically every 6.1m (20ft).
l
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.
Figure 86 :
Grounding and lightning protection on building
Summary of Contents for PMP 450 Series
Page 92: ...Chapter 2 System hardware 92 Figure 29 MicroPoP Omni antenna implementation pattern Vertical...
Page 134: ...Chapter 3 System planning 134 Figure 51 Mast or tower installation...
Page 135: ...Chapter 3 System planning 135 Figure 52 Wall installation...
Page 136: ...Chapter 3 System planning 136 Figure 53 Roof installation...
Page 137: ...Chapter 3 System planning 137 Figure 54 GPS receiver wall installation...
Page 158: ...Chapter 3 System planning 158 Figure 61 cnMedusa Antenna...