Chapter 2. Planning for your rack cabinet
13
Defining rack cabinet electrical requirements
The rack cabinet does not require electricity, but the servers and optional devices that
you install inside of a rack cabinet do require connection to properly wired and
grounded electrical outlets. An electrician might need to assist you with planning for
electrical requirements, such as:
•
Each rack cabinet requires at least one uninterruptible power supply (UPS) or
power distribution unit (PDU) for servers and optional devices that you install in
the rack cabinet.
•
Each PDU or UPS requires a separate ac power branch circuit.
•
The input voltage-selection switch on each device that you install in the rack
cabinet must match the output voltage on the UPS or PDU.
•
Power cords must match electrical outlets at the location where you install the
rack cabinet.
Review the following safety information as you plan for your rack cabinet:
Statement 8
DANGER
•
Plug power cords from devices in the rack cabinet into electrical out-
lets that are located near the rack cabinet and are easily accessible.
•
Each rack cabinet might have more than one power cord. Be sure to
disconnect all power cords in the rack cabinet before servicing any
device in the rack cabinet.
•
Install an emergency-power-off switch if more than one power device
(power distribution unit or uninterruptible power supply) is installed in
the same rack cabinet.
•
Connect all devices installed in a rack cabinet to power devices
installed in the same rack cabinet. Do not plug a power cord from a
device installed in one rack cabinet into a power device installed in a
different rack cabinet.
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