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Review the final floor plan to ensure that cable lengths are not too long and that the
rack cabinets have enough clearance.
Power requirements
The rack cabinet does not require electricity, but the servers and optional devices
that you install inside a rack cabinet do require connection to properly wired and
grounded electrical outlets. You might need an electrician to assist you with
planning for electrical requirements. For example:
v Each rack cabinet requires at least one uninterruptible power supply or power
v Each PDU or uninterruptible power supply requires a separate ac power branch
v The input voltage-selection switch on each device that you install in the rack
v Power cords must match electrical outlets at the location where you install the
Review the following safety information as you plan for your rack cabinet.
Statement 8:
DANGER
distribution unit (PDU) for servers and optional devices that you install in the rack
cabinet.
circuit.
cabinet must match the output voltage on the uninterruptible power supply or
PDU.
rack cabinet.
v Plug power cords from devices in the rack cabinet into electrical outlets
that are located near the rack cabinet and are easily accessible.
v 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.
v 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.
v 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.
Chapter 2. Site preparation and requirements
11
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