Cisco Systems N3KC3524P10G manual Proper Grounding Practices

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

Proper Grounding Practices

Grounding is one of the most important parts of equipment installation. Proper grounding practices ensure that the buildings and the installed equipment within them have low-impedance connections and low-voltage differentials between chassis. When you properly ground systems during installation, you reduce or prevent shock hazards, equipment damage due to transients, and data corruption. Table 2-2lists some general grounding practice guidelines.

Table 2-2 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
malfunctions due to
electromagnetic noise.

	Cisco Nexus 3000 Series Hardware Installation Guide
OL-25338-04		2-11