User's Guide

Table Of Contents
Chapter 4: System planning
44
In high lightning-prone geographical areas, the drop cable shield must be grounded at spacing
between 15 to 22 m
(50 to 75 ft). This is especially important on towers taller than 45 m (150 ft).
For roof installations, use the following additional criteria:
The drop cable shield must be bonded to the building grounding system at its top entry point
(usually on the roof).
The drop cable shield must be bonded to the building grounding system at the entry point to the
equipment room.
PSU DC power supply
Use Cambium recommended DC PSU for Wireless nodes and ensure Power cords and cables are appropriately rated
and in accordance with the regulations of the country of use.
PSU AC power supply
Use Cambium recommended AC power supply for Wireless nodes and ensure Power cords and cables are appropriately rated
and in accordance with the regulations of the country of use.
PSU location
Find a location for the PSU that meets the following requirements:
DC PSU Injector
DC Power Injector can be mounted on a flat surface.
PSU is installed in a dry location where no condensation, flooding or rising damp is possible.
The PSU is located in an environment where it is not likely to exceed its operational temperature
rating, allowing for
natural convection cooling and placed not close to any fire source.
PSU can be connected to the ODU drop cable and network terminating equipment.
PSU can be connected to a compatible power supply.
Outdoor AC PSU
Find a location for the PSU that meets the following requirements:
The PSU is installed in a dry location where no flooding or rising damp is possible.
The PSU is located in an environment where it is not likely to exceed its operational temperature
rating, allowing for
natural convection cooling and placed not close to any fire source.
The PSU is not stacked and placed on the adjacent to the heat generating equipment.
The PSU shall be connected to protective Earth.
The PSU shall be connected to ODU drop cable using cable joiner and appropriate rated cables
shall be used.