b) Place one hand on the front of the power supply and place your other hand under it to support its weight.
c) Align the power supply to an open power supply slot.
The alignment bracket on top of the power supply should align to a track at the top of the slot and a bar at
the bottom of the power supply should be guided by a track at the bottom of the slot.
Note
d) Slide the power supply all the way into the slot until it stops.
e) Slide the handle in the middle of the ejector lever toward the end of the lever and rotate the lever to the front of the
power supply. Release the middle handle.
The lever should grab the inside of the slot and push the power supply onto its mid plane connectors.
Note
f) Screw in the two captive screws on the front of the power supply to the chassis. Tighten each screw to 8 in-lb (0.9
N·m).
Grounding a Switch Chassis
The switch is fully grounded as soon as you connect the chassis and the power supplies to the earth ground
in the following ways:
•
You connect the chassis to either a fully-bonded, grounded rack or to the data center ground.
The system ground, also referred to as the network equipment building system (NEBS)
ground, provides additional grounding for EMI shielding requirements and for the
low-voltage supplies (DC-DC converters) on the modules. This grounding system is
active even when the AC and HVAC/HVDC power cables are not connected to the
system.
Note
•
You connect the AC and HVAC/HVDC power supplies to the earth ground automatically when you
connect an AC or HVAC/HVDC power supply to an AC or HVAC/HVDC power source.
Before You Begin
Before you can ground the chassis, you must have a connection to the earth ground for the data center building.
If you installed the switch chassis into a bonded rack (see the rack manufacturer's instructions for more
information) that now has a connection to the data center earth ground, you can ground the chassis by connecting
its grounding pad to the rack. Otherwise, you must connect the chassis grounding pad directly to the data
center ground.
To connect the switch chassis to the data center ground, you need the following tools and materials:
•
Grounding lug
—
A two-holed standard barrel lug that supports up to 6 AWG wire. This lug is supplied
with the accessory kit.
•
Grounding screws
—
Two M4 x 8 mm (metric) pan-head screws. These screws are shipped with the
accessory kit.
•
Grounding wire
—
Not supplied with the accessory kit. This wire should be sized to meet local and
national installation requirements. Depending on the power supply and system, a 12 AWG to 6 AWG
copper conductor is required for U.S. installations. We recommend that you use commercially available
Cisco Nexus 7702 Hardware Installation Guide
23
Installing the Switch Chassis
Grounding a Switch Chassis
