Cisco AJ732A - MDS 9134 Fabric Switch Installation Manual page 76

System Grounding
Table 2-2
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 MDS 9200 Series Hardware Installation Guide
2-20
Grounding Best Practices
Electromagnetic Noise Severity
Level
High
High
Medium to high
Medium
Low
Low
Chapter 2 Installing the Cisco MDS 9200 Series
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 practices must
be closely followed.
Best grounding practices must
be closely followed.
Best grounding practices must
be closely followed.
Best grounding practices 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 victim equipment.
Best grounding practices should
be followed as closely as
possible. Electromagnetic noise
problems are not anticipated, but
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.
Best grounding practices should
be followed as much as possible.
Electromagnetic noise problems
are not anticipated, but
installing a best practice
grounding system is always
recommended.
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