Cisco Catalyst 9400 Series Hardware Installation Manual page 126

Connecting the DC-Input Wires
Procedure
Step 1
Locate the circuit breaker on the panel board that services the DC circuit, and switch the circuit breaker to
the OFF position.
Step 2
Prepare the DC-input wires and the grounding wire. Crimp the lugs to the cable ends according to the lug
manufacturer's direction and your local electrical codes for installation.
Use a heat-shrink sleeve to ensure that there is no exposed wiring extending from the terminal block, when
installed.
If you are using cables of different colors for your DC-input wires, we recommend one color for all the positive
circuits, a second color for all the negative circuits, and a third color, which is normally solid green or green
with yellow stripes, for the safety ground connection.
Step 3
Using a number one Phillips screwdriver, loosen the captive installation screw on the terminal block cover.
Step 4 Using a nut driver, loosen and remove the two nuts in the terminal slot meant for grounding, and set them
aside.
The nut driver you are using must have at least a three-inch shaft, to clear the height of the terminal block
cover and enable you to loosen or tighten the nuts in the terminal slots.
Warning
Cisco Catalyst 9400 Series Switches Hardware Installation Guide
120
When installing or replacing the unit, the ground connection must always be made first and
disconnected last. Statement 1046
Removing and Replacing FRUs