Cisco Catalyst 9400 Series User Manual

Grounding RecommendationsElectromagnetic Noise
Severity Level
Environment
Best grounding practices must be closely
followed.
Medium to HighCommercial building contains a mix
of information technology equipment
and industrial equipment, such as
welding.
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.
MediumExisting 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.
LowNew 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.
LowExisting 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
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
Maintaining Safety with Electricity
When working on electrical equipment, follow these guidelines:
• Do not work alone if potentially hazardous conditions exist anywhere in your work space.
• Never assume that power is disconnected from a circuit; always check the circuit before working on it.
Cisco Catalyst 9400 Series Switches Hardware Installation Guide
34
Preparing for Installation
Maintaining Safety with Electricity

Cisco Catalyst 9400 Series Specifications

General

Brand	Cisco
Model	Catalyst 9400 Series
Category	Switch
Language	English