Gtr 8000 Base Radio Grounding; Figure 40: Battery Temperature Sensor Example 2 - Motorola ASTRO 25 GTR 8000 Manual

MN003286A01-E
Chapter 3: GTR 8000 Base Radio Installation
Attach the sensing cable to an existing battery tray support bracket using cable ties or nylon loop
straps of the proper size. Mount the sensing element not more than 2 inches from the surface of the
batteries being monitored. Use a minimum of two cable ties and/or loop straps to secure the sensing
cable to the bracket. Place the cable ties/ loop straps no more than 6 inches apart with one placed no
more than 2 inches from the sensing element. See
on page 104.

Figure 40: Battery Temperature Sensor Example 2

3.4.5

GTR 8000 Base Radio Grounding

Detailed grounding information is beyond the scope of this manual. See the Standards and Guidelines
for Communication Sites manual for detailed information about grounding and lightning protection.
IMPORTANT: Ground the battery system, either positive or negative, at the battery. The DC
input (battery charger output) of the power supply floats with respect to earth ground. The
power supply can therefore be used in either positive ground or negative ground DC systems.
Connect the appropriate terminal (+ or -) of the DC system to protective earth at the battery.
These instructions assume that all telephone lines, antenna cables, and AC or DC power
cables have been properly grounded and lightning-protected.
When rack installations have a primary rack and one or more expansion racks, all these racks must be
connected to the same Sub System Ground Bus Bar (SSGB) (with no other rack connected to the
SSGB). Grounding ensures that surge events do not produce ground potential differences that affect
signals between the racks.
104
Figure 40: Battery Temperature Sensor Example 2