Cisco Systems N3KC3524P10G manual Establishing the System Ground

Chapter 2 Installing the Cisco Nexus 3000 Series Switches

Grounding the Switch

Se n d d o c u m e n t c o m m e n t s t o n ex u s 3 k - d o c f e e d b a ck @ c i sc o . c o m

Table 2-2 Proper Grounding Guidelines (continued)

	Electromagnetic Noise
Environment	Severity Level	Grounding Recommendations
New commercial building is not	Low	Electromagnetic noise problems are not
subject to natural environmental		anticipated, but installing a grounding
noise or man-made industrial		system in a new building is often the least
noise. This building contains a		expensive route and the best way to plan for
standard office environment.		the future. Best grounding
		recommendations should be followed as
		closely as possible.
Existing commercial building is	Low	Electromagnetic noise problems are not
not subject to natural		anticipated, but installing a grounding
environmental noise or		system is always recommended. Best
man-made industrial noise. This		grounding recommendations should be
building contains a standard		followed as much as possible.
office environment.

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 addition, ensure that all I/O cables and power cords are properly seated. These practices are normal installation practices and must be followed 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 and is intended to satisfy the 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 connection is required if this equipment is installed in a U.S. or European Central Office.

•You do not need to power down the chassis because the Cisco Nexus 3000 Series switches are equipped with AC-input power supplies.

	Cisco Nexus 3000 Series Hardware Installation Guide
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