6-5
Cisco Nexus 7000 Series Hardware Installation and Reference Guide
OL-23069-07
Chapter 6 Installing Power Supplies
Connecting an AC Power Supply to AC Power Sources
• Connecting a 3-kW AC Power Supply to AC Power Sources, page 6-5
• Connecting a 6-kW AC Power Supply to AC Power Sources, page 6-6
• Connecting a 7.5-kW AC Power Supply to AC Power Sources, page 6-7
Prerequisites for Connecting AC Power Supplies to AC Power Sources
Before you connect the power supplies to AC power sources, you must mount the power supplies in the
chassis, and you must make sure that the appropriate AC power source receptacles are located close
enough to the power supplies so that the power cords can connect the power supplies to the power
sources. For North American installations of 3-kW or 6-kW AC power supplies, you must have one or
two 20-A rated, 110V or 220V circuits. For North American installations of 7.5-kW power supplies, you
must have one or two 30-A rated, 220-V AC circuits. For international installations, you must size the
circuits by local and national codes. If you are using the input source redundancy mode, you must have
at least two circuits.
Connecting a 3-kW AC Power Supply to AC Power Sources
The 3-kW AC power supply ships with one power cable that you must attach to the power supply and its
AC power source. To configure power supply redundancy mode, input source redundancy mode, or full
redundancy mode, you connect at least two power supplies to one or two AC power sources.
To connect a 3-kW AC power supply to one or more power sources, follow these steps:
Step 1 Ensure that the power supply switch located on the front of the power supply is set at standby (labelled
as 0).
Step 2 Plug one AC power cable into the power supply, and pull down the retention clip over the plug on the
power cable.
Step 3 Plug the other end of the power cable into a AC power source supplied by the data center.
Note If you are using the combined power mode or power supply redundancy, you connect the power cables
to the same 20-A circuit. If you are using the input source redundancy mode or full redundancy mode,
you connect half of the power cables to one AC power source and the other half to another AC power
source.
Warning
Take care when connecting units to the supply circuit so that wiring is not overloaded.
Statement 1018
Warning
This product relies on the building’s installation for short-circuit (overcurrent) protection. Ensure that
the protective device is rated not greater than:
250V, 20 A
Statement 1005
Step 4 Turn the power supply switch from standby to on (from 0 to 1 as labelled on the power switch).
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