System Grounding - Cisco 6509 - Catalyst Chassis Switch Installation Manual

Site Requirements

System Grounding

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.
lists some general grounding practice guidelines.
Table 2-1
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.
Catalyst 6500 Series Switches Installation Guide
2-6
Gounding Practice Guidelines
Electromagnetic
Noise Severity Level Grounding Recommendations
High
High
Medium to High
Medium
Low
Low
Chapter 2 Preparing for Installation
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.
Table 2-1
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