Prerequisites For Grounding The Chassis; Required Tools And Equipment; Connecting The System Ground - Cisco Nexus 7000 Series Hardware Installation And Reference Manual

Installing a Cisco Nexus 7018 Chassis
you connect the AC power to the system. The system ground, also referred to as the network equipment
building system (NEBS) ground, provides additional grounding for EMI shielding requirements and for the
low-voltage supplies (DC-DC converters) on the modules. This grounding system is active even when the
AC power cables are not connected to the system. You establish this ground by connecting one of the two
grounding pads on the chassis to the rack (if it is connected to an earth ground) or directly to the earth ground
for the data center building.
This section includes the following topics:

Prerequisites for Grounding the Chassis

Before you can ground the chassis, you must have a connection to the earth ground for the data center building.
If you installed the Cisco Nexus 7018 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 ground ports to the rack. Otherwise, you must connect the chassis grounding ports directly to
the data center ground.

Required Tools and Equipment

To connect the system 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
• Grounding screws—Two M4 x 8 mm (metric) pan-head screws. These screws are shipped with the Cisco
• Grounding wire—Not supplied with the Cisco Nexus 7018 system accessory kit. This wire should be
• Number 1 Phillips-head screwdriver with torque capability.
• Crimping tool to crimp the grounding wire to the grounding lug.
• Wire-stripping tool to remove the insulation from the grounding wire.

Connecting the System Ground

After you have moved the chassis into the rack or cabinet, you are ready to connect the system to the earth
ground. After you ground the chassis, you can ground your ESD wrist strap by connecting it to the chassis.
To connect the system ground to the earth ground, follow these steps:
Step 1
Use a wire-stripping tool to remove approximately 0.75 inch (19 mm) of the covering from the end of the grounding
wire.
Step 2
Insert the stripped end of the grounding wire into the open end of the grounding lug as shown in
Grounding Wire in the Grounding Lug, on page
with the Cisco Nexus 7018 system accessory kit.
Nexus 7018 system accessory kit.
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.
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Cisco Nexus 7000 Series Hardware Installation and Reference Guide
Prerequisites for Grounding the Chassis
Figure 52: Inserting the
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