How To Ground Base Radio/Receiver; Connections - Rear (Integrated Voice And Data); Figure 3-7 Rack Grounding - Motorola GTR 8000 Manual

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) (and no other rack connected to the SSGB). This is to ensure surge
events do not produce ground potential differences that will affect signals between the racks.
The base radio/receiver backplane has a double lug with two lock nuts on the rear panel where the ground wire
connects to the base radio backplane on one end, and to the rack grounding bar on the other. The rack grounding bar
is connected to the master ground bus bar.
To use the grounding lugs, you need a length of #6 AWG wire with UL-listed ring lugs on both ends. This wire
is shipped with the base radio.

Figure 3-7 Rack Grounding

3.4.4.1 How to Ground Base Radio/Receiver

Procedure Steps
1 Take the ground wire already attached to the two grounding lugs at the rear of the base radio/receiver, and
connect the other end to the rack grounding bar.
2 Tighten the ground lock nut to 60 inch-pounds (6.94 newton-meters).
3.4.5 Connections – Rear (Integrated Voice and Data)
The base radio/receiver connects to a site LAN switch port for this channel and to the transmit and receive paths.
6871022P86-A - November 2012

3.4.4.1 How to Ground Base Radio/Receiver

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