Grounding Infrastructure Equipment; Conforming To Regulations; Protecting Cables And Connections; Testing The Components - Motorola PMP 320 Hardware Installation

Grounding Infrastructure Equipment

Grounding Infrastructure Equipment
To protect both your staff and your infrastructure equipment, implement lightning protection as
follows:
•
Observe all local and national codes that apply to grounding for lightning protection.
•
Before you install your modules, perform the following steps:
•
Install your modules at least 2 feet (0.6 meters) below the tallest point on the tower, pole,
or roof.

Conforming to Regulations

For all electrical purposes, ensure that your network conforms to applicable country and local
codes, such as the NEC (National Electrical Code) in the U.S.A. If you are uncertain of code
requirements, engage the services of a licensed electrician.
In particular, many codes require that wired electrical devices like the 56 VDC power supply
either terminate in a plug connection or be wired with an on/off switch, and not be hard-wired
to AC/mains.

Protecting Cables and Connections

Cables that move in the wind can be damaged, impart vibrations to the connected device, or both.
At installation time, prevent these problems by securing all cables with cable ties, cleats,
or weather-resistant tape.
The cable can be a path for water to follow to enter the cable connector or even the module.
You can prevent this problem by including and securing a drip loop where the cable enters
the module enclosure.

Testing the Components

The best practice is to connect all the components - BHs, APs, GPS antenna, and CMM4 - in
a test setting and initially configure and verify them before deploying them to an installation.
However, circumstances or local practice may require a different practice.
PMP320HDW2v1
Engage a grounding professional if you have any questions on grounding.
Install lightning arrestors to transport lightning strikes away from equipment. For
example, install a lightning rod on a tower leg other than the leg to which you mount
your module.
Connect your lightning rod to ground.
Plan to use an appropriate surge suppressor on any Ethernet cable at the point where
it enters any building or structure.
Preliminary
Chapter 3: CMM4 Hardware Installation
3-25
JUL 2010