Cisco Systems MDS 9500 Series manual Environment Level Grounding Recommendations

Chapter 2 Installing the Cisco MDS 9500 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 2-4	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.
					Appropriate grounding practices
					must be closely followed.
		Commercial building is located		High	Appropriate grounding practices
		in an area where lightning			must be closely followed.
		storms frequently occur but is
		not subject to direct lightning
		strikes.
		Commercial building contains a		Medium to high	Appropriate grounding practices
		mix of information technology			must be closely followed.
		equipment and industrial
		equipment, such as welding.
		Existing commercial building is		Medium	Appropriate grounding practices
		not subject to natural			must be closely followed.
		environmental noise or			Determine source and cause of
		man-made industrial noise. This			noise if possible, and mitigate as
		building contains a standard			closely as possible at the noise
		office environment. This			source or reduce coupling from
		installation has a history of			the noise source to the victim
		malfunction due to			equipment.
		electromagnetic noise.
		New commercial building is not		Low	Appropriate grounding practices
		subject to natural environmental			should 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	Appropriate grounding practices
		not subject to natural			should be followed as much as
		environmental noise or			possible. Electromagnetic noise
		man-made industrial noise. This			problems are not anticipated, but
		building contains a standard			installing a best practice
		office environment.			grounding system is always
					recommended.
	Cisco MDS 9500 Series Hardware Installation Guide
2-18					OL-17467-02