Dell PowerVault NX3000 Guide De Mise En Route page 7

Securing the Power Cable(s)
Bend the system power cable(s) into a loop as shown in the illustration and
secure the cable(s) to the bracket using the provided strap.
Plug the other end of the power cable(s) into a grounded electrical outlet or
a separate power source such as an uninterruptible power supply (UPS) or
a power distribution unit (PDU).
Turning On the System
Press the power button on the system and on the optional monitor, if used.
The power indicators should light.
5
Getting Started With Your System