Cisco Systems MDS 9200 Series manual 2-20, Environment, Level, Grounding Recommendations

Chapter 2 Installing the Cisco MDS 9200 Series

System Grounding

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 m d s f e e d b a ck - d o c @ c i s c o . c o m

Table 2-2 Grounding Best Practices

			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 practices must
				be closely followed.
		Commercial building is located	High	Best grounding practices must
		in an area where lightning		be closely followed.
		storms frequently occur but is
		not subject to direct lightning
		strikes.
		Commercial building contains a	Medium to high	Best grounding practices must
		mix of information technology		be closely followed.
		equipment and industrial
		equipment, such as welding.
		Existing commercial building is	Medium	Best grounding practices must
		not subject to natural		be closely followed. Determine
		environmental noise or		source and cause of noise if
		man-made industrial noise. This		possible, and mitigate as closely
		building contains a standard		as possible at the noise source or
		office environment. This		reduce coupling from the noise
		installation has a history of		source to the victim equipment.
		malfunction due to
		electromagnetic noise.
		New commercial building is not	Low	Best grounding practices should
		subject to natural environmental		be followed as closely as
		noise or man-made industrial		possible. Electromagnetic noise
		noise. This building contains a		problems are not anticipated, but
		standard office environment.		installing a best practice
				grounding system in a new
				building is often the least
				expensive route and the best way
				to plan for the future.
		Existing commercial building is	Low	Best grounding practices should
		not subject to natural		be followed as much as possible.
		environmental noise or		Electromagnetic noise problems
		man-made industrial noise. This		are not anticipated, but
		building contains a standard		installing a best practice
		office environment.		grounding system is always
				recommended.
	Cisco MDS 9200 Series Hardware Installation Guide
2-20				OL-17468-02