Cisco Systems 5000 manual Environment, Severity Level, Grounding Recommendations, 2-18

Chapter 2 Installing the Cisco Nexus 5000 Series Switches

Grounding the Switch

Se n d d o c u m e n t a t i o n c o m m e n t s t o n ex u s 5 k d o c s @ c i s c o . c o m .

Table 2-5 Proper Grounding Guidelines

	Electromagnetic Noise
Environment	Severity Level	Grounding Recommendations
Commercial building is	High	All lightning protection devices must be
subjected to direct lightning		installed in strict accordance with
strikes.		manufacturer recommendations.
For example, some places in the		Conductors carrying lightning current
		should be spaced away from power and
United States, such as Florida,
		data lines in accordance with applicable
are subject to more lightning
		recommendations and codes. Best
strikes than other areas.
		grounding recommendations must be
		closely followed.
Commercial building is located	High	Best grounding recommendations must be
in an area where lightning		closely followed.
storms frequently occur but is
not subject to direct lightning
strikes.
Commercial building contains a	Medium to high	Best grounding recommendations must be
mix of information technology		closely followed.
equipment and industrial
equipment, such as welding.
Existing commercial building is	Medium	Determine source and cause of noise if
not subject to natural		possible, and mitigate as closely as possible
environmental noise or		at the noise source or reduce coupling from
man-made industrial noise. This		the noise source to the affected equipment.
building contains a standard		Best grounding recommendations must be
office environment. This		closely followed.
installation has a history of
malfunction due to
electromagnetic noise.
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.

	Cisco Nexus 5500 Platform and Cisco Nexus 5000 Platform Hardware Installation Guide
2-18	OL-15902-02