User's Manual

iRelay 460 Equipment Installation Guide
UGD-D01035
Airspan Commercial and Internal Use 21
Figure 19: iR460 with Internal POE and External Surge Protection and Grounding
Warning: Failure to meet the safety requirements and use of non-standard practices and
procedures can result in personal injury and damage to the equipment. A direct lightning strike
might cause serious damage even if these guidelines are followed.
All outdoor wireless equipment is susceptible to lightning damage from a direct hit or induced current
from a near strike. Lightning protection and grounding practices in local and national electrical codes
serve to minimize the equipment damage, service outages, and serious injury.
A lighting protection system provides a means by which the energy might enter earth without passing
through and damaging the parts of a structure. A lightning protection system does not prevent
lightning from striking; it provides a means for controlling it and preventing the damage by providing a
low resistance path for the discharge of energy to travel safely to the ground. Improperly grounded
connections are also a source of noise that can cause a sensitive equipment to malfunction.
To limit the equipment damage caused by a lightning strike to a wireless system, Airspan
recommends the following practices:
• Provide a direct grounding from the iR460, and the lightning or surge protectors to the same
ground point at the base of the tower or a ground bus on the building. Use the grounding
screws on the iR460 unit for terminating the ground wires.
• The AC wall outlet ground must be connected to the same grounding system as iR460.