Installing Power Supplies - Cisco Nexus 7000 Hardware Installation And Reference Manual

Installing Power Supplies

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Installing Power Supplies
You can install two or more power supplies in each Cisco Nexus 7000 Series chassis. If you leave any
power supply slots empty, you must install a blank filler plate in those slots to maintain the designed
airflow.
Table 6-1 Power Supplies Utilized by the Cisco Nexus 7000 Series Switch Models
Number of power supply slots
3-kW AC power supply (N7K-AC-3KW)
6-kW AC power supply (N7K-AC-6.0KW)
7.5-kW AC power supply (N7K-AC-7.5KW-INT and
N7K-AC-7.5KW-US)
3-kW DC power supply (N7K-DC-3KW)
6-kW DC power supply (N7K-DC-6KW)
Blank (N7K-3KPS-BLANK-H)
Blank (N7K-PS-BLANK=)
For the Cisco Nexus 7004 switches, the chassis ships with their power supplies already installed. For the
Note
Cisco Nexus 7009, 7010, and 7018 switches, the power supplies ship with the chassis but are boxed
separately, so you must install them using the instructions provided in this chapter.
When you install AC and DC power supplies in a Cisco Nexus 7000 Series chassis, you mount them
similarly, but you ground them differently. For an AC power supply, you automatically ground it when
you connect it to the AC power source because the power cable includes a ground connection. For a
6-kW DC power supply, you must connect the power supply to the earth ground before you connect it to
the DC power source. For the 3-kW DC power supply, you do not connect it directly to the earth ground
because it is grounded through the chassis.
To mount a power supply in a Cisco Nexus 7000 Series chassis, follow these steps:
Ensure that the power switch on the front of the power supply is set to standby (labelled as STBY or 0)
Step 1
and that the power supply is not connected to any power sources.
Grasp the handle on the power supply with one hand, place the other hand under the power supply, and
Step 2
orient its back end to an open power supply bay.
Slide the unit all the way into the power supply bay until one of the following situations occurs:
Step 3
Cisco Nexus 7000 Series Hardware Installation and Reference Guide
6-2
For 3-kW DC power supplies, you need four power cables sized to reach the DC power source or
power interface unit (PIU)
Grounding wire—This wire should be sized to meet local and national installation requirements. For
U.S. installations, you must use a 6 AWG copper conductor. For installations outside the U.S.,
consult your local and national electrical codes. The length of the grounding wire depends on the
proximity of the switch to proper grounding facilities.
Table 6-1 lists the quantities and types of power supplies that you can install in each chassis.
Cisco Nexus Cisco Nexus
7004 7009
4 2
X —
— X
— X
X —
— X
X —
— X
Chapter 6 Installing Power Supplies
Cisco Nexus Cisco Nexus
7010 7018
3 4
— —
X X
X X
— —
X X
— —
X X
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