What to do next
After you have secured the chassis to the rack, you can connect the chassis to the data center ground.
Grounding a Switch Chassis
The switch is fully grounded as soon as you connect the chassis and the power supplies to the earth ground
in the following ways:
• You connect the chassis to either a fully-bonded, grounded rack or to the data center ground.
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 and HVAC/HVDC power cables
are not connected to the system.
Note
The NEBS ground equipment is suitable for installation in Network
Telecommunications Facilities and locations where the National Electric Code
(NEC) applies. The equipment is suitable for installation as part of the Common
Bonding Network (CBN).
Note
• You connect the AC and HVAC/HVDC power supplies to the earth ground automatically when you
connect an AC or HVAC/HVDC power supply to an AC or HVAC/HVDC power source.
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 manual Phillips-head torque screwdriver.
Cisco Nexus 7710 Switch Site Preparation and Hardware Installation Guide
OL-30452-01.
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Installing the Chassis
Grounding a Switch Chassis