Cisco Nexus 7000 User Manual

6-8
Cisco Nexus 7000 Series Hardware Installation and Reference Guide
OL-23069-07
Chapter 6 Installing Power Supplies
Connecting a DC Power Supply to DC Power Sources
Connecting a DC Power Supply to DC Power Sources
To power your Cisco Nexus 7000 Series switch with DC power supplies, you must first ground the power
supplies and then connect the power supplies to a DC power source. You can then connect the power
supply directly to DC power sources or indirectly through a power interface unit (PIU), which is
connected to a DC power source.
This section includes the following topics:
• Grounding a 3-kW DC Power Supply, page 6-8
• Grounding a 6-kW DC Power Supply, page 6-8
• Connecting a DC Power Supply Directly to DC Power Sources, page 6-10
• Connecting a Power Supply to DC Power Sources through a Power Interface Unit, page 6-18
Grounding a 3-kW DC Power Supply
The 3-kW DC power supply is grounded through the chassis so you do not connect the power supply
directly to the earth ground.
Grounding a 6-kW DC Power Supply
After you have mounted a 6-kW DC power supply in a Cisco Nexus 7000 Series chassis, you must
ground the power supply to the earth ground before connecting it to the DC power source. You ground
this power supply by connecting the grounding pad on the lower front side of the power supply to the
earth ground.
Caution Although you connect each 6-kW DC power supply to an earth ground before you connect it to the DC
power grid, you should also connect the chassis to an earth ground. For information about grounding a
Cisco Nexus 7004 chassis, see the “Grounding the Cisco Nexus 7004 Chassis” section on page 2-9. For
information about grounding the Cisco Nexus 7009 chassis, see the “Grounding the Cisco Nexus 7009
Chassis” section on page 3-19. For information about grounding the Cisco Nexus 7010 chassis, see the
“Grounding the Cisco Nexus 7010 Chassis” section on page 4-11. For information about grounding the
Cisco Nexus 7018 chassis, see the “Grounding the Cisco Nexus 7018 Chassis” section on page 5-13.
Warning Installation of the equipment must comply with local and national electrical codes. Statement 1074
To connect the system ground to the data center earth ground, follow these steps:
Step 1 Use a wire-stripping tool to remove approximately 0.75 inch (19 mm) of the covering from the end of
the grounding wire.
Step 2 Insert the stripped end of the grounding wire into the open end of the grounding lug as shown in
Figure 6-1.

Cisco Nexus 7000 Specifications

General

Brand	Cisco
Model	Nexus 7000
Category	Switch
Language	English