Cisco Systems MGX 8230 manual Using the Electrostatic Wrist Strap, Gauge Ohms per 1000 Feet

Chapter 3 Site Preparation

Power and Grounding

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
000	0,0617		11	1.257
00	0.0778		12	1.5849
0	0.098		13	1.9987
1	0.1237		14	2.5206
2	0.156		15	3.1778
3		0.1967	16		4.0075
4		0.248	17		5.0526
5		0.3128	18		6.3728
6		0.3944	19		8.0351
7		0.4971	20		10.1327
8		0.6268	21		12.7782
9	0.7908		22	16.1059

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.

	Cisco MGX 8230 Edge Concentrator Installation and Configuration
Release 1.1.31, Part Number 78-11215-03 Rev. B0, May 2001		3-21