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Cisco VG202 and Cisco VG204 Voice Gateways Hardware Installation Guide
OL-15959-01
Chapter 3 Installing Cisco VG202 and Cisco VG204 Voice Gateways
Installing the Ground Connection
Warning
This equipment must be grounded. Never defeat the ground conductor or operate the equipment in the
absence of a suitably installed ground conductor. Contact the appropriate electrical inspection
authority or an electrician if you are uncertain that suitable grounding is available.
Statement 1024
Warning
Use copper conductors only.
Statement 1025
To connect the chassis to a reliable earth ground, perform the following steps:
Step 1
Locate a suitable ground.
Tip
Using a multimeter, measure the resistance between various possible ground locations, such as between
the ground of a junction box (outlet) and the ground of a power tap, between the ground of a junction
box and a metal water pipe, between the Cisco VG202 or Cisco VG204 chassis and the ground of a power
tap, and between the Cisco VG202 or Cisco VG204 chassis and the ground of a junction box. A good
ground connection should read between 0.0 and 0.5 ohms.
Step 2
Strip one end of the ground wire to the length required for the ring terminal.
Step 3
Crimp the ground wire to the ground lug or ring terminal, using a crimp tool of the appropriate size. (See
Figure 3-4
.)
Figure 3-4
Crimping a Ground Lug onto the Ground Wire
Step 4
Attach the ring terminal to the chassis as shown in
Figure 3-5
. For a ring terminal, use one of the screws
provided. Use a number-2 Phillips screwdriver, and tighten the screws to a torque of 8 to 10 in-lb (0.9
to 1.1 N-m).
10360
