Cisco Systems 5000 Series manual Environment Level Grounding Recommendations

Chapter 2 Installing the Cisco Nexus 5000 Switch

Grounding the System

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 2-3 Proper Grounding Guidelines

		Electromagnetic Noise Severity
	Environment	Level	Grounding Recommendations
	Commercial building is	High	All lightning protection devices
	subjected to direct lightning		must be installed in strict
	strikes.		accordance with manufacturer
	For example, some places in the		recommendations. Conductors
			carrying lightning current
	United States, such as Florida,
			should be spaced away from
	are subject to more lightning
			power and data lines in
	strikes than other areas.
			accordance with applicable
			recommendations and codes.
			Best grounding
			recommendations must be
			closely followed.
	Commercial building is located	High	Best grounding
	in an area where lightning		recommendations must be
	storms frequently occur but is		closely followed.
	not subject to direct lightning
	strikes.
	Commercial building contains a	Medium to high	Best grounding
	mix of information technology		recommendations must be
	equipment and industrial		closely followed.
	equipment, such as welding.
	Existing commercial building is	Medium	Determine source and cause of
	not subject to natural		noise if possible, and mitigate as
	environmental noise or		closely as possible at the noise
	man-made industrial noise. This		source or reduce coupling from
	building contains a standard		the noise source to the affected
	office environment. This		equipment. Best grounding
	installation has a history of		recommendations must be
	malfunction due to		closely followed.
	electromagnetic noise.
	New commercial building is not	Low	Electromagnetic noise problems
	subject to natural environmental		are not anticipated, but
	noise or man-made industrial		installing a grounding system in
	noise. This building contains a		a new building is often the least
	standard office environment.		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	Low	Electromagnetic noise problems
	not subject to natural		are not anticipated, but
	environmental noise or		installing a grounding system is
	man-made industrial noise. This		always recommended. Best
	building contains a standard		grounding recommendations
	office environment.		should be followed as much as
			possible.
		Cisco Nexus 5000 Series Hardware Installation Guide
OL-15902-01				2-11