Grounding The Chassis - Cisco Nexus 93120TX Installation Manual

Installing the Chassis
Step 2 Use a customer-supplied rack-mount screw (an M6 x 10 mm screw or other appropriate screw for the rack) to attach
each of the two mounting brackets on the chassis to the rack and tighten each screw to the appropriate torque setting for
the screw (for M6 x 10 mm screws, use 40 in-lbs [4.5 N·m] of torque).

Grounding the Chassis

The switch is grounded when you connect the chassis and the power supplies to the earth ground in both of
the following ways:
• You connect the chassis (at its grounding pad) to the data center ground. If the rack is fully-bonded and
• You connect each power supply to the data center ground.
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
grounded, you can ground the switch by connecting it to the data center ground indirectly through the
rack. Otherwise, you must connect the chassis directly to the data center ground.
The chassis ground connection is active even when the power supply modules have not
Note
been grounded or connected to the switch.
◦ AC power supplies are automatically grounded when you connect the power supply to an AC
power source (see Powering Up the Switch, on page
◦ DC power supplies are grounded when you connect the ground cable to the power source ground
terminal while also connecting the positive and negative wires to their power source terminals (see
Powering Up the Switch, on page 27).
Cisco Nexus 93120TX NX-OS Mode Switch Hardware Installation Guide

Grounding the Chassis

27).
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