Cisco Nexus 3000 Series Installation Manual page 9

Installing the Switch Chassis
Note
• You connect each AC power supply to the earth ground automatically when you connect the power
supply to an AC power source (see
• You connect each DC power supply to the earth ground when you connect the power cables to the
connector block and insert the connector block to the power supply (see
Statement 1024—Ground Conductor
Warning
This equipment must be grounded. Never defeat the ground conductor or operate the equipment in the
absence of a suitably installed ground conductor. Contact the appropriate electrical inspection authority
or an electrician if you are uncertain that suitable grounding is available.
Statement 1046—Installing or Replacing the Unit
Warning
When installing or replacing the unit, the ground connection must always be made first and disconnected
last.
Before You Begin
Before you can ground the chassis, you must have a connection to the earth ground for the data center building.
If you installed the switch chassis into a bonded rack (see the rack manufacturer's instructions for more
information) that now has a connection to the data center earth ground, you can ground the chassis by connecting
its grounding pad to the rack. Otherwise, you must connect the chassis grounding pad directly to the data
center ground.
To connect the switch chassis to the data center ground, you need the following tools and materials:
• Grounding lug—A two-holed standard barrel lug that supports up to 6 AWG wire. This lug is supplied
with the accessory kit.
• Grounding screws—Two M4 x 8 mm (metric) pan-head screws. These screws are shipped with the
accessory kit.
• Grounding wire—Not supplied with the accessory kit. This wire should be sized to meet local and
national installation requirements. Depending on the power supply and system, a 12 AWG to 6 AWG
copper conductor is required for U.S. installations. We recommend that you use commercially available
6 AWG wire. The length of the grounding wire depends on the proximity of the switch to proper grounding
facilities.
• Number 1 Phillips-head torque screwdriver.
• Crimping tool to crimp the grounding wire to the grounding lug.
The chassis ground connection is active even when the power supply modules have not
been grounded or connected to the switch.
Powering Up the
Cisco Nexus 9372TX ACI-Mode Switch Hardware Installation Guide
Grounding the Chassis
Switch).
Powering Up the Switch).
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