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2-12
Cisco Nexus 3000 Series Hardware Installation Guide
OL-25338-04
Chapter 2 Installing the Cisco Nexus 3000 Series Switches
Grounding the Switch
Note In all situations, grounding practices must comply with local National Electric Code (NEC)
requirements or local laws and regulations.
Note Always ensure that all of the modules are completely installed and that the captive installation screws
are fully tightened. In additio n, ensure that all I/O cables and power cords are properly seated. Th ese
practices are normal installat ion practices and must be follow ed in all installations.
Establishing the System Ground
This section describes how to connect a system ground to the Cisco Nexus 3000 Series switch.
You must use the system ground on AC-powered systems if you are installing this equipment in a U.S.
or European Central Office.
The system ground provides additional grounding for EMI shielding requirements and grounding for the
low-voltage supplies (DC-DC converters) on the modules an d is intended to satisfy t he Telcordia
Technologies requirements for supplemental bonding and grounding connections. You must observe the
following system grounding guidelines for your chassis:
• You must install the system ground connection with any other rack or system power ground
connections that you make. The system ground connection is required if this equipment is installed
in a U.S. or European Central Office.
• You must connect both the system ground connection and the power supply ground connection to
an earth ground. The system ground conn ection is required i f this equipment is in stalled in a U.S.
or European Central Office.
• You do not need to power down the chassis because th e Cisco Nexus 3000 Series switche s are
equipped with AC-input power supplies.
New commercial building is not
subject to natural environmental
noise or man-made industrial
noise. This building c ontains a
standard office environment.
Low Electromagnetic noise problems are not
anticipated, but installing a gr ounding
system in a new building is often the least
expensive route and the best way to plan for
the future. Best grounding
recommendations should be followed as
closely as possible.
Existing commercial building is
not subject to natural
environmental noise or
man-made industrial noise. This
building contains a standard
office environment.
Low Electromagnetic noise problems are not
anticipated, but installing a gr ounding
system is always recommended. Best
grounding recommendations should be
followed as much as possible.
Table 2-2 Proper Grounding Guidelines (continued)
Environment
Electromagnetic Noise
Severity Level Grounding Recommendations