Cisco Nexus 93180YC-FX3S Installation Manual page 7

Replacing Components
Step 4
Verify that the power supply is operational by making sure that the power supply LED is green.
Wiring a 48 V DC Electrical Connector Block
You must connect the ground, negative, and positive DC power cables to a connector block in order to connect
the power cables to a 48 V DC power supply.
Note
The recommended wire gauge is 8 AWG. The minimum wire gauge is 10 AWG.
Warning
Statement 342 Before Connecting to System Power Supply
High touch/leakage current – Permanently connected protective earth ground is essential before connecting
to system power supply.
Warning Statement 1024 Ground Conductor
This equipment must be grounded. To reduce the risk of electric shock, never defeat the ground conductor or
operate the equipment in the absence of a suitably installed ground conductor. Contact the appropriate electrical
inspection authority or an electrician if you are uncertain that suitable grounding is available.
Before you begin
You must turn off the circuit breaker for the DC power cables that you are connecting to prevent electrocution.
Step 1 Verify that the circuit breaker for the power feed to the replacement power supply is turned off.
Step 2
Remove the DC power connector block from the power supply by doing the following:
a) Push the orange plastic button on the top of the connector block inward toward the power supply.
b) Pull the connector block out of the power supply.
Step 3
Strip 0.6 inches (15 mm) of insulation off the DC wires that you are using.
Step 4 Orient the connector as shown in the following figure with the orange plastic button on top.
Wiring a 48 V DC Electrical Connector Block
Replacing Components
7