Installation and Operation Instructions

Telrad Networks Ltd. BreezeAIR Installation Guide
Page 28 of 29
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All outdoor wireless equipment is susceptible to lightning damage from a direct hit or
induced current from a near strike. A direct lightning strike may cause serious damage even
if these guidelines are followed. Lightning protection and grounding practices in local and
national electrical codes serve to minimize equipment damage, service outages, and serious
injury.
Possible reasons for lightning damage:
1. Poorly grounded antenna sites that can conduct high lightning strike energy into
equipment.
2. Lack of properly installed lightning protection equipment can cause equipment
failures from lightning induced currents.
A lighting protection system provides a means by which the energy may enter earth without
passing through and damaging parts of a structure. A lightning protection system does not
prevent lightning from striking, and instead provides a means for preventing damage to
equipment by providing a low resistance path for the discharge of energy to travel safely to
ground. Improperly grounded connections are also a source of noise that can cause
sensitive equipment to malfunction.
A good grounding system disperses most of the surge energy from a lightning strike away
from the building and equipment. The remaining energy on the Ethernet cable shield and
conductors can be directed safely to ground by installing a lightning arrestor in series with
the cable.
If you have determined that it is appropriate to install lightning protection for your system,
the following general industry practices are provided as a guideline only:
1. The AC wall outlet ground for the indoor POE adapter should be connected to the
building grounding system.
2. Install a lightning arrestor in series with the Ethernet cable at the point of entry to
the building. The grounding wire should be connected to the same termination point
used for the tower or mast.
3. Provide direct grounding from the unit, the mounting bracket, the antenna, and the
Ethernet cable surge protection to the same ground bus on the building. Use the
grounding screws provided for terminating the ground wires.
Figure 8-1: Lightning protection scheme

Note: BreezeAIR wireless equipment should be installed by a qualified professional
installer who is knowledgeable of and follows local and national codes for
electrical grounding and safety. Failure to meet safety requirements and/or
use of non-standard practices and procedures could result in personal injury
and damage to equipment.

Outdoor
Surge
protection
Outdoor
unit
PoE
Outdoor
Indoor
CAT5
CAT5
To ground
Indoor
Surge
protection
CAT5