Connecting a 3-kW AC Power Supply to AC Power Sources
You use one power cord to connect a 3-kW power supply to its AC power source and to ground the power
supply. Depending on the power mode that you use for the switch, you either connect all of the power supplies
to one AC power source or you connect half of the power supplies to one AC power source and the other half
to another AC power source:
• For combined power mode (no power redundancy), you need enough power supplies to power all switch
operations and connect all of the power supplies to the same AC power source. You can install the power
supplies in any open power supply slot in the chassis.
• For power supply redundancy mode (n+1 redundancy mode), you need enough power supplies to power
all switch operations and one extra power supply that can replace a failing power supply. You connect
all power supplies to the same AC power source. You can install the power supplies in any open power
supply slot in the chassis.
• For input source redundancy (grid redundancy) mode or full redundancy mode, you need twice the
number of power supplies needed to power the switch operations. You connect half of the power supplies
to one power source for active power and the other half to another power source for redundant power.
You must ensure that the power supplies on the left side of the chassis (slots 1, 2, 5, and 6) are connected
to one grid and that the power supplies on the right side of the chassis(slots 3, 4, 7, and 8) are connected
to the other grid.
Before you begin
Before you connect power supplies to one or two power sources, ensure all of the following:
• You have receptacles for one or two AC power sources within reach of the power supply cables. The
number of power sources depends on the power mode to be used for the switch.
• Combined power (no power redundancy)—One AC power source
• Power supply redundancy (n+1 redundancy)—One AC power source
• Input source redundancy (power-grid redundancy)—Two AC power sources
• Full redundancy—Two AC power sources
• The AC power sources are rated as follows:
• For North American installations—20A with 110V or 220V circuits.
• For international installations—size the circuits by local and national standards.
• The power supply is already installed in the chassis.
• The chassis is connected to an earth ground.
Step 1 Ensure that the power supply switch located on the front of the power supply is set at standby (labeled 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.
Cisco Nexus 7710 Switch Site Preparation and Hardware Installation Guide
OL-30452-01.132
Installing or Replacing Modules, Fan Trays, and Power Supplies
Connecting a 3-kW AC Power Supply to AC Power Sources
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