Connecting A Dc Power Supply To Dc Power Sources; Grounding A 3-Kw Dc Power Supply; Grounding A 6-Kw Dc Power Supply - Cisco Nexus 7000 Hardware Installation And Reference Manual

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:
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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.
Although you connect each 6-kW DC power supply to an earth ground before you connect it to the DC
Caution
power grid, you should also connect the chassis to an earth ground. For information about grounding a
Cisco Nexus 7004 chassis, see the
information about grounding the Cisco Nexus 7009 chassis, see the
Chassis" section on page
"Grounding the Cisco Nexus 7010 Chassis" section on page
Cisco Nexus 7018 chassis, see the
Installation of the equipment must comply with local and national electrical codes. Statement 1074
Warning
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.
Insert the stripped end of the grounding wire into the open end of the grounding lug as shown in
Step 2
Figure
Cisco Nexus 7000 Series Hardware Installation and Reference Guide
6-8
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
3-19. For information about grounding the Cisco Nexus 7010 chassis, see the
6-1.
"Grounding the Cisco Nexus 7004 Chassis" section on page
4-11. For information about grounding the
"Grounding the Cisco Nexus 7018 Chassis" section on page
Chapter 6 Installing Power Supplies
"Grounding the Cisco Nexus 7009
OL-23069-07
2-9. For
5-13.