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Cisco MGX 8230 Edge Concentrator Installation and Configuration
Release 1.1.31, Part Number 78-11215-03 Rev. B0, May 2001
Chapter3 Site Preparation
Power and Grounding
Using the Electrostatic Wrist Strap
The MGX 8230 ships with a wrist strap for grounding the user and protecting the electronic components
from electrostatic shock. The wrist strap kit consists of a strap, a coiled cord, and a clip for holding the
strap.
Cisco recommends you install the base of the wrist strap cable on the left front flange of one of the units
at a convenient height. Use a front mounting screw to secure the ring lug to the flange and front rail. The
other end of the cord connects to the strap with a snap connector. Peel the back off the clip to expose the
adhesive surface and attach to the front of the unit above the ring lug. Mount the clip sideways to allow
the strap to be held in a position that will not interfere with the removal of the number card. Use the clip
to store the strap.
Co-Locating Cisco Units in the Same Rack
Different Cisco products can reside in the same rack. If a multi system rack configuration includes an
MGX 8600 series switch, it should reside as the bottom unit.
Making the Frame Bonding (Ground) Connection
This section describes the steps for making ground connections that comply with the Cisco MSSBU
grounding policies. The descriptions cover optional ground connections from each node to the ground
connector of the rack as well as the equalization connections between racks that are part of the earth
grounding network.
Table 3-3 Resistance for Each Gauge of Copper Wire
Gauge Ohms per 1000 Feet Gauge Ohms per 1000 Feet
0000 0.0489 10 0.9968
1.257
1.5849
1.9987
2.5206
3.1778
4.0075
5.0526
6.3728
8.0351
10.1327
12.7782
16.1059
000 0,0617
0.0778
0.098
0.1237
0.156
0.1967
0.248
0.3128
0.3944
0.4971
0.6268
0.7908
11
00 12
013
114
215
316
417
518
619
720
821
922