Grounding A Switch Chassis - Cisco Nexus 7706 Hardware Installation Manual

Installing the Switch Chassis
Note The two alignment brackets on top of the fan tray should align to two tracks at the top of the
slot.
b) Slide the fan tray into the slot until the front of the fan tray comes in contact with the rear of the chassis.
The two alignment pins on the fan tray (on the top and one on the bottom) should go into holes in the chassis
Note
and the four captive screws on the fan tray should align to screw holes in the chassis.
c) Screw in the four captive screws to the chassis and tighten each screw to 8 in-lb (0.9 N·m).
Step 10
If you removed any power supplies before moving the chassis, reinstall each one as follows:
a) Determine which power supply slots to fill and ensure that each of those slots is open.
If you are using the combined or power supply redundancy mode, you can use any slot for the power supply that you
are installing. If you are using input-source or full redundancy mode, you must group the power supplies that are to
be connected to the same grid on either the left or right power supply slots in the chassis (that is, place the power
supplies for grid A in slots 1 or 2 or both slots and place the power supplies for grid B in slots 3 or 4 or both slots).
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.
Note 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.
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
Note If you are using the combined power or power-supply redundancy mode, you can fill any power supply slot
with the power supplies. If you are using input-source or full redundancy modes, you must place half of the
power supplies in slots 1 and 2, and you must place the other half of the power supplies in slots 3 and 4 (half
will be used for available power and the other half will be used for redundant power).
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.
• You connect the AC power supplies to the earth ground automatically when you connect an AC power
OL-31330-01
The system ground, also referred to as the network equipment building system (NEBS)
Note
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 power cables are not connected to the system.
supply to an AC power source.

Grounding a Switch Chassis

Cisco Nexus 7706 Hardware Installation Guide
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