4-4
Cisco Nexus 2000 Series Hardware Installation Guide
Chapter4 Installing a Cisco Nexus Fabric Extender
Preparing for Installation
•Ensure that the cabinet or rack meets the requirements listed in Appendix A, “Cabinet and Rack
Installation.”
Note Jumper power cords are available for use in a cabinet. See the “Jumper Power Cord” section on
page C-8.
•Ensure that the chassis is adequately grounded. If the device is not mounted in a grounded rack, we
recommend connecting both the system ground on the chassis and the power supply ground to an
earth ground.
•Ensure that the site power meets the power requirements listed in AppendixB, “Technical
Specifications,” If available, you can use an uninterrupted power supply (UPS) to protect against
power failures.
Caution Avoid UPS types that use ferroresonant technology. These UPS types can become unstable
with systems such as the Cisco Nexus FEX, which can have substantial current draw
fluctuations because of fluctuating data traffic patterns.
•Ensure that circuits are sized according to local and national codes. For North America, the power
supply requires a 15-A or 20-A circuit.
Caution To prevent loss of input power, ensure the total maximum loads on the circuits supplying
power to the device are within the current ratings for the wiring and breakers.
•Use the following screw torques when installing the device:
–
Captive screws: 4 in-lb
–
M3 screws: 4 in-lb
–
M4 screws: 12 in-lb
–
10-32 screws: 20 in-lb
–
12-24 screws: 30 in-lb
Required Tools and Equipment
Before beginning the installation, ensure that the following items are ready:
•Number 1 and number 2 Phillips screwdrivers with torque capability
•3/16-inches flat-blade screwdriver
•Tape measure and level
•ESD wrist strap or other grounding device
•Antistatic mat or antistatic foam
The following additional items (not found in the accessory kit) are required to ground the chassis:
•Grounding cable (6 AWG recommended), sized according to local and national installation
requirements; the required length depends on the proximity of the Cisco Nexus FEX to proper
grounding facilities
•Crimping tool large enough to accommodate girth of lug