User's Guide

Table Of Contents
57
External cables
Safety may be compromised if outdoor rated cables are not used for connections that will be exposed to the outdoor
environment.
Drop cable tester
The PSU output voltage may be hazardous in some conditions, for example in wet weather. Do not connect a drop
cable tester to the PSU, either directly or via LPUs.
RF exposure near the antenna
Strong radio frequency (RF) fields will be present close to the antenna when the transmitter is on. Always turn off the power to the
radio before undertaking maintenance activities in front of the antenna.
Minimum separation distances
Ensure that personnel are not exposed to unsafe levels of RF energy. The units start to radiate RF energy as soon as they are
powered up. Never work in front of the antenna when the radio is powered. Install the radios so as to provide and maintain the
minimum separation distances from all persons. For minimum separation distances, see Link to separation distances table.
Grounding and lightning protection requirements
Ensure that the installation meets the requirements defined in Installation section.
Grounding cable installation methods
To provide effective protection against lightning induced surges, observe these requirements:
Grounding conductor runs are as short, straight and smooth as possible, with bends and curves
kept to a minimum.
Grounding cables must not be installed with drip loops.
All bends must have a minimum radius of 200 mm (8 in) and a minimum angle of 90°. A diagonal run
is preferable to a
bend, even though it does not follow the contour or run parallel to the supporting
structure.
All bends, curves and connections must be routed towards the grounding electrode system, ground
rod, or
ground bar.
Grounding conductors must be securely fastened.
Braided grounding conductors must not be used.
Approved bonding techniques must be used for the connection of dissimilar metals.
Siting radios
Radios are not designed to survive direct lightning strikes. For this reason, they must be installed in Zone B as defined in Lightning
protection zones. Mounting in Zone A may put equipment, structures and life at risk.