Grounding Recommendations
Electromagnetic Noise Severity
Level
Environment
Electromagnetic noise problems are
not anticipated, but installing a
grounding system in a new building
is often the least expensive route
and the best way to plan for the
future. Best grounding
recommendations should be
followed as closely as possible.
Low
New commercial building is not
subject to natural environmental
noise or man-made industrial noise.
This building contains a standard
office environment.
Electromagnetic noise problems are
not anticipated, but installing a
grounding system is always
recommended. Best grounding
recommendations should be
followed as much as possible.
Low
Existing commercial building is not
subject to natural environmental
noise or man-made industrial noise.
This building contains a standard
office environment.
Grounding the Fabric Interconnect
The fabric interconnect has a grounding pad with two threaded M4 holes for attaching a grounding lug. The
following are guidelines for grounding the fabric interconnect.
When installing or replacing the unit, the ground connection must always be made first and disconnected last.
[Statement 1046]
Warning
The plug-socket combination must be accessible at all times, because it serves as the main disconnecting
device. [Statement 1019]
Warning
• We recommend grounding the fabric interconnect, even if the rack is already grounded.
• All power supplies must be grounded. The receptacles of the AC power cables used to provide power to
the fabric interconnect must be the grounding type, and the grounding conductors should connect to
protective earth ground at the service equipment.
• Grounding the fabric interconnect is required if you are using DC power supplies, even if the rack is
already grounded. A grounding pad with two threaded M4 holes is provided on the fabric interconnect
for attaching a grounding lug. The ground lug must be NRTL listed. In addition, the copper conductor
(wires) must be used and the copper conductor must comply with NEC code.
Procedure
Step 1
Use a wire-stripping tool to remove approximately 0.75 inches (19 mm) of the covering from the end of the
grounding cable.
Cisco UCS 6400 Series Fabric Interconnect Hardware Installation Guide
23
Installing the Cisco UCS Fabric Interconnect
Grounding the Fabric Interconnect