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Cisco ME 6500 Series Ethernet Switch Installation Guide
OL-8900-03
Chapter 2 Preparing for Installation
Site Requirements
Shock and Vibration
Cisco ME 6524 Ethernet switches have been shock- and vibration-tested for operating ranges, handling,
and earthquake standards to NEBS (Zone 4 per GR-63-Core). These tests have been conducted in
earthquake environment and criteria, office vibration and criteria, transportation vibration and criteria,
and packaged equipment shock.
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.
Table 2-1
lists some general grounding practice guidelines.
Table 2-1
Grounding Practice Guidelines
Environment
Electromagnetic
Noise Severity Level Grounding Recommendations
A 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
practices must be closely followed; consult
with the site or local electrician.
A commercial building is located
in an area where lightning storms
frequently occur but is not
subject to direct lightning
strikes.
High
Best grounding practices must be closely
followed; consult with the site or local
electrician.
A commercial building contains
a mix of information technology
equipment and industrial
equipment, such as welding.
Medium to High
Best grounding practices must be closely
followed; consult with the site or local
electrician.
An 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
malfunctions due to
electromagnetic noise.
Medium
Best grounding practices must be closely
followed; consult with the site or local
electrician. 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 your
system.
