Grounding Recommendations
Electromagnetic Noise
Severity Level
Environment
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.
Medium
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.
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.
Low
New commercial building is not
subject to natural environmental noise
or man-made industrial noise. This
building contains a standard office
environment.
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.
Low
Existing commercial building is not
subject to natural environmental noise
or man-made industrial noise. This
building contains a standard office
environment.
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 a 6 AWG grounding wire.
Note
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 are
fully tightened. In addition, ensure that all the I/O cables and power cords are properly seated. These
practices are normal installation practices and must be followed in all installations.
Note
Category 5e, Category 6, and Category 6a cables can store large levels of static electricity because of the
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.
Caution
Cisco Catalyst 6807-XL Switch Hardware Installation Guide
OL-30656-01
21
Preparing for Installation
System Grounding
