Cisco CATALYST 6509E 9 SLOT 15U CHASSIS NO POWER SUPPLY NO FAN TRAY Specification Guide
2-6
Catalyst 6500 Series Switches Installation Guide
OL-5781-04
Chapter 2 Preparing for Installation
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.
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
Gounding Practice Guidelines
Environment
Electromagnetic
Noise Severity Level Grounding Recommendations
Noise Severity Level Grounding Recommendations
Commercial building is
subjected to direct lightning
strikes.
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.
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
practices must be closely followed.
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.
Commercial building is located
in an area where lightning storms
frequently occur but is not
subject to direct lightning
strikes.
in an area where lightning storms
frequently occur but is not
subject to direct lightning
strikes.
High
Best grounding practices must be closely
followed.
followed.
Commercial building contains a
mix of information technology
equipment and industrial
equipment, such as welding.
mix of information technology
equipment and industrial
equipment, such as welding.
Medium to High
Best grounding practices must be closely
followed.
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.
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
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.
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.
New commercial building is not
subject to natural environmental
noise or man-made industrial
noise. This building contains a
standard office environment.
subject to natural environmental
noise or man-made industrial
noise. This building contains a
standard office environment.
Low
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.
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.
Existing commercial building is
not subject to natural
environmental noise or
man-made industrial noise. This
building contains a standard
office environment.
not subject to natural
environmental noise or
man-made industrial noise. This
building contains a standard
office environment.
Low
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.
as much as possible. Electromagnetic noise
problems are not anticipated, but installing a
best practice grounding system is always
recommended.