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Cisco uBR-3x10 RF Switch Hardware Installation and Cabling Guide
OL-1984-06
Chapter 3 Installing the Cisco RF Switch
Connecting Power
Tools and Equipment
• Grounding lug (included)—The grounding lug must have two M5 screw holes with 0.625 to 0.75 in.
(15.86 to 19.05 mm) spacing between them.
• Two M5 (metric) hex-head screws with locking washers.
• 8-mm wrench or nut driver (or adjustable wrench)
• Grounding wire (4 AWG recommended)—The length of the grounding wires depends on the
location of your router within the site and its proximity to proper grounding facilities.
• One segment of 1.5 in. (3.8 cm) length of 0.5 in. (1.2 cm) diameter heatshrink tubing.
• Heating device for the heatshrink tubing.
Note The hex-head screws with locking washers, grounding wire, and heatshrink tubing are not available from
Cisco Systems. You must obtain them from an electrical-connector vendor.
To connect the grounding wire to the Cisco uBR 3x10 RF Switch:
Step 1 Ensure that the Cisco uBR 3x10 RF Switch is powered off and that you have disconnected the AC power
cord or DC power leads from the power supply.
Step 2 Strip approximately 0.75 in. (2 cm) of shielding from one end of the grounding wire.
Step 3 Insert the stripped end of the grounding wire into the open end of the grounding lug and crimp the
grounding lug securely to the grounding wire.
Step 4 Slide the segment of heatshrink tubing over the joint of the grounding lug and grounding wire so that the
exposed connection is covered.
Step 5 Shrink the tubing in place using a suitable heating device.
Step 6 Attach the grounding lug to the power-supply side of the Cisco uBR 3x10 RF Switch chassis using the
two M5 hex-head screws.
Step 7 Connect the other end of the grounding wire to an appropriate ground source.
Figure 3-7 Chassis Grounding Location
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