16
PRE-INST
ALLATION
CONSIDERA
T
IONS
Installation Guide
One of the most important considerations when
designing a communications site is the ground
and lightning protection system. Make sure
installations meet all local and state building codes
in you area.
Electrical Ground
Ground wires carrying electrical current from
circuitry or equipment at the site is included in the
category of electrical ground. Examples include
the AC or DC electrical power used to source
equipment located at the site, and wires or cables
connected to alarms or sensors located at the site.
RF Ground
This type of ground is related to the transmission
of the radio frequency energy to earth ground. An
example of RF grounding is the use of shielding to
prevent or at least minimize the leakage of
unwanted RF transmissions from communications
equipment and cables.
Lightning Ground
Providing adequate lightning protection is critical
to a safe reliable communications site. RF
transmission cables, and AC and DC power lines
must all be protected to prevent lightning energy
from entering the site building.
Although a comprehensive coverage of the site
grounding technique and lightning protection is not
within the scope of this instruction manual, there
are several excellent industry sources for rules
and guidelines on ground and lightning protection
at communications site.
Note:
Motorola recommends the following
reference source: “Motorola Quality
Standards Fixed Network Equipment
Installation Manual R56” P/N 6881089E50.
(Refer to "Surge Protective Devices",
"External Grounding" and "Internal
Grounding" chapters in manual entitled
“Manual Instrument R56 FXD Equipment
Installation” (Manual part number
6881089E50_).
2000018_B_PORS_en.book Page 16 Thursday, January 14, 2010 2:10 PM
