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Screen Cable
Surge Arrestor Unit at ODU – ALPU-
Earth Cable at Building Entry
Surge Arrestor Unit at Building Entry
Andrew
ODU
Grounding
Assembly to
Tower
Surge Arrestor
to ODU Ground
Connection
Optional Ethernet
Fibre connection to
ODU
Andrew
Grounding
Assembly to
Tower
Grounding Stakes
Typical Mast Installation
Figure 74: Diagrammatically showing typical wall and mast installations
A typical installation is shown in Figure 75 and Figure 76.
Note: Grounding Points are shown unprotected for clarity. Grounding points should be
adequately weatherproofed to prevent corrosion and possible loss of ground continuity.
Issue 3.1, July 2006
Earth ODU
ORT
– ALPU-ORT
Table 10: Protection Requirements
Surge Arrestor
mounted the same
height as the ODU
Ground Connections should
be less than 0.6 metres
(2 feet) long. All upper
tower grounds should be
within 0.3 metres (1 foot) of
the ODU bracket and on the
same metal
Screened CAT 5e cable
Surge Arrestor
PIDU Plus
Fibre Connection to Network
Where fitted
Zone A
Mandatory
Mandatory
Mandatory
Mandatory
Mandatory
Surge Arrestor to
ODU Ground
Connection
Grounding Cable
Copper Connection to
Network
Grounding Stake
Zone B
Mandatory
Mandatory
Mandatory
Mandatory
Mandatory
Optional Ethernet Fibre
ODU
connection to ODU
Power/Ethernet
Connection
Surge Arrestor
Screened CAT 5e cable
Surge Arrestor
PIDU Plus
Fitted inside building
Copper Connection
to Network
Fibre Connection to
Network
Where fitted
Typical Wall Installation
Page 123 of 162
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