Cisco 5000 Series Hardware Installation Manual page 78

Grounding the System
Table 3-4
Environment
Commercial building is
subjected to direct lightning
strikes.
For example, some places in the
United States, such as Florida,
are subject to more lightning
strikes than other areas.
Commercial building is located
in an area where lightning
storms frequently occur but is
not subject to direct lightning
strikes.
Commercial building contains a
mix of information technology
equipment and industrial
equipment, such as welding.
Existing commercial building is
not subject to natural
environmental noise or
man-made industrial noise. This
building contains a standard
office environment. This
installation has a history of
malfunction due to
electromagnetic noise.
New commercial building is not
subject to natural environmental
noise or man-made industrial
noise. This building contains a
standard office environment.
Existing commercial building is
not subject to natural
environmental noise or
man-made industrial noise. This
building contains a standard
office environment.
Cisco Nexus 5000 Series Hardware Installation Guide
3-14
S e n d c o m m e n t s t o n 5 k d o c s @ c i s c o . c o m
Proper Grounding Guidelines
Electromagnetic Noise
Severity Level
High
High
Medium to high
Medium
Low
Low
Chapter 3 Installing the Cisco Nexus 5500 Platform or 5000 Series Switch
Grounding Recommendations
All lightning protection devices
must be installed in strict
accordance with manufacturer
recommendations. Conductors
carrying lightning current
should be spaced away from
power and data lines in
accordance with applicable
recommendations and codes.
Best grounding
recommendations must be
closely followed.
Best grounding
recommendations must be
closely followed.
Best grounding
recommendations must be
closely followed.
Determine source and cause of
noise if possible, and mitigate as
closely as possible at the noise
source or reduce coupling from
the noise source to the affected
equipment. Best grounding
recommendations must be
closely followed.
Electromagnetic noise problems
are not anticipated, but
installing a grounding system in
a new building is often the least
expensive route and the best
way to plan for the future. Best
grounding recommendations
should be followed as closely as
possible.
Electromagnetic noise problems
are not anticipated, but
installing a grounding system is
always recommended. Best
grounding recommendations
should be followed as much as
possible.
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