User's Manual

Table Of Contents
110 Link CX User Manual, Version A
Ground-mounted support structures should be connected at their base to a ground ring through
sacrificial ground lugs. Towers should have a connection from each leg.
A ground ring should consist of copper cable or solid copper tape, with ground rods equally spaced at
2-m intervals around the base of the structure as close to it as possible. The ground ring is buried
approximately 0.6 m deep where soil conditions allow. An alternative method using radials rather than
rings is detailed in The Grounds for Lightning and EMP Protection
, published by PolyPhaser
Corporation.
The ground ring should be connected to the main building ground by the most direct route, and should
be buried as appropriate.
Roof-mounted structures should be connected to the main building ground by the most direct route,
using sacrificial lugs and copper cable or tape as appropriate. Tower guy wires should be directly
bonded at their lowest point to a suitable ground electrode or connected to the site ground by the most
direct route.
A4-4 Bibliography
ITU - T K.40
Protection against LEMP in telecommunications centres
ITU - T K.27
Bonding configurations and earthing inside a telecommunication building
ITU - T K.35
Bonding configurations and earthing at remote electronic sites
ITU - T K.39
Risk assessment of damages to telecommunications sites due to lightning discharges
ITU - T Lightning Handbook
The protection of telecommunication lines and equipment against lightning discharges
IEEE Emerald Book
Powering and Grounding
The Grounds for Lightning and EMP Protection, second edition
Published by PolyPhaser Corporation