Cisco 6503 - Catalyst Firewall Security Sys Installation Manual page 112

Site Requirements
Table 2-3
Environment
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.
Note In all situations, grounding practices must comply with Section 250 of the National Electric Code (NEC)
requirements or local laws and regulations. A 6 AWG grounding wire is preferred from the chassis to the
rack ground or directly to the common bonding network (CBN). The equipment rack should also be
connected to the CBN with 6 AWG grounding wire.
In installations where FXS modules are installed, supplemental grounding is required.
Note
Always ensure that all of the modules are completely installed and that the captive installation screws
Note
are fully tightened. In addition, ensure that all I/O cables and power cords are properly seated. These
practices are normal installation practices and must be followed in all installations.
Category 5e, Category 6, and Category 6a cables can store large levels of static electricity because of the
Caution
dielectric properties of the materials used in their construction. Always ground the cables (especially in
new cable runs) to a suitable and safe earth ground before connecting them to the module.
Catalyst 6500 Series Switches Installation Guide
2-18
Grounding Practice Guidelines (continued)
Electromagnetic
Noise Severity Level Grounding Recommendations
Medium
Low
Low
Chapter 2 Preparing for Installation
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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