Cisco 5000 Series - Manual (Page 78)

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
3-14
Cisco Nexus 5000 Series Hardware Installation Guide
OL-15902-01
Chapter 3 Installing the Cisco Nexus 5500 Platform or 5000 Series Switch
Grounding the System
Table 3-4 Proper Grounding Guidelines
Environment
Electromagnetic Noise
Severity Level
Grounding Recommendations
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.
High 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.
Commercial building is located
in an area where lightning
storms frequently occur but is
not subject to direct lightning
strikes. High Best grounding
recommendations must be
closely followed.
Commercial building contains a
mix of information technology
equipment and industrial
equipment, such as welding. Medium to high Best grounding
recommendations must be
closely followed.
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. Medium 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.
New commercial building is not
subject to natural environmental
noise or man-made industrial
noise. This building contains a
standard office environment. Low 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.
Existing commercial building is
not subject to natural
environmental noise or
man-made industrial noise. This
building contains a standard
office environment. Low Electromagnetic noise problems
are not anticipated, but
installing a grounding system is
always recommended. Best
grounding recommendations
should be followed as much as
possible.