Cisco Nexus 7000 Hardware Installation And Reference Manual page 170

Connecting a DC Power Supply to DC Power Sources
Figure 6-7
1 Remove screws from cover.
Install four cables (two positive and two negative cables) in the four terminal slots as follows:
Step 5
Unscrew the two nuts in each of the four terminal slots.
a.
b. Attach and crimp each lug to the end of each power cable.
c. Attach each cable lug to the two terminal posts in each slot, fasten with two nuts, and tighten to 40
in-lb (4.5 N·m).
Note
Replace the safety cover on the terminal box and fasten with three screws.
d.
Install the four cables from the DC power supply to a DC power source as follows:
Step 6
a. If the unconnected end of each power cable is not stripped of its insulation for the last 0.75 inches
(19 mm), use wire strippers to remove that amount of insulation.
Attach the negative cables to the negative terminals of a DC power source, and attach the positive
b.
cables to the positive terminals of the same power source.
Note
For the powered down circuits connected to the power supplies, turn on the power at the circuit breaker.
Step 7
The Input 1 (IN1) and Input 2 (IN2) LEDs turn on each connected power supply.
Cisco Nexus 7000 Series Hardware Installation and Reference Guide
6-16
Removing the Safety Cover for the Terminal Box on the 3-kW DC Power Supply
For all your power connections, if you are using cables with two different colors, use one color
cable for all positive circuits and the other color for all negative circuits.
If you are using combined power mode or power supply redundancy mode, connect all the power
supplies in the chassis to the same power source. If you are using input source redundancy mode
or full redundancy mode, connect half the power supplies to one DC power source and the other
half of the power supplies to another DC power source.
Chapter 6
2 Remove the safety cover.
Installing Power Supplies
OL-23069-07