Cisco 7100 Series - Manual (Page 4)

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— One grounding wire—6-AWG, 0.162-inch (4.115-mm) diameter, with approximately
0.108 inch (2.743 mm) of insulation, for a total wire diameter of approximately
0.27 inch (6.858 mm). The wire’s length is dependent on your router location and site
environment. This wire is not available from Cisco Systems; it is available from any
commercial cable vendor.
— Crimping tool large enough to accommodate the diameter of the wire receptacle on
your grounding lug.
— Wire stripper.
Prepare for Installation (continued)