Dell PowerEdge C8220 Hardware Owner's Manual page 64

Chassis PSU Configuration
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Chassis PSU Configuration
Option
Required Power Supplies
(1 default)
Redundant Power
Supplies (1 default)
Refer to the Boundaries of PSU Configuration table on page 65 when
changing the configuration of the power supplies to load-shared or redundant
power.
64
Using the System Setup Program
Description
Select the number of power supplies to provide load-shared
power to run the sleds in the enclosure. Options are [1],
[2], [3], and [4].
Select the number of power supplies to provide power
redundancy to the enclosure. Options are [0], [1], and [2].