NEC DS1000 Correspondence Course Workbook page 80

DS1000/2000 Correspondence Course
DS2000 System Installation
80 DS1000/2000 Workbook
Attach the ground wire(s).
The system provides two ground
terminations. Each ground con-
nects from the system to the ground
termination using 12 AWG stranded
copper wire.
Use the ETH (Earth Ground) for
safety/system ground. You must
connect ETH to a known earth
ground.
Use the PBXG (PBX Ground) if
you have trunks that require telco
ground (such as ground start
trunks). This ground is not
required for loop start trunks.
1. Remove the lug on the ground connection you want to connect.
2. Following the figure to the right, run
the ground wire(s) through the
RFI Suppressor Assembly as shown.
You must install separate RFI
Suppressor Assemblies for the
ground wire and the CPU con-
nections (i.e., mod jack and RS-232 cables). The suppressors must
be mounted inside the cabinet and as close to the appropriate con-
nection point as possible.
If your system has 2 ground wires, install them both in the same
assembly.
3. For Earth Ground:
Run a ground wire from the ETH lug to a known earth ground.
For PBX Ground:
Run a ground wire from the PBXG lug to the telco ground.
4. Crimp ring terminals as required to the ground wires.
5. Reinstall and firmly tighten the lug(s) removed in step 1 above.
Do not plug in the power cord or reinstall the right side
panel until all PCB installation and cabling are complete.
4-Slot Cabinet Shown
To earth ground
To telco ground
NEC America