Dell PowerVault MD3600f Get Started Manual page 11

Connecting the Power Cable(s)
Ensure that the power switch is in the OFF position before connecting the
power cables. Connect the system's power cable(s) to the system.
Securing the Power Cable(s)
Secure the cable(s) firmly to the bracket using the provided strap.
Plug the other end of the power cables into a grounded electrical outlet or
a separate power source such as an uninterrupted power supply (UPS) or
a power distribution unit (PDU). Each power supply must be connected
to a separate power circuit.
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Getting Started With Your System