Cisco Nexus 7702 Hardware Installation Manual page 81

Installing or Replacing Modules, Fan Trays, and Power Supplies
Step 4
Remove the three screws that hold down the safety cover for the terminal box on the front of the DC power supply and
remove the cover (see the following figure).
The terminal box has four slots for four power terminals (ordered as negative [-], positive [+], positive [+], and
Note
negative [-]). Each terminal has two nuts that you use to fasten a power cable to the terminal.
Figure 19: Removing the Safety Cover for the Terminal Box on a 3-kW DC Power Supply
1 Remove three screws from the safety cover.
Step 5 Install four cables (two positive and two negative cables) in the four terminal slots as follows:
a) Unscrew the two nuts in each of the four terminal slots.
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 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.
d) Replace the safety cover on the terminal box and fasten with three screws.
Step 6 Install the four cables from the DC power supply to a DC power source as follows:
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.
b) Attach the negative cables to the negative terminals of a DC power source, and attach the positive cables to the
positive terminals of the same power source.
If you are using combined power mode or power supply redundancy mode, connect all the power supplies
Note
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.
Connecting DC Power Supplies with Power Sources
2 Remove the cover.
Cisco Nexus 7702 Hardware Installation Guide
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