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Chapter 2: Server Installation
Circuit Overloading
Consideration should be given to the connection of the equipment to the power supply circuitry
and power supply wiring. Appropriate consideration of equipment nameplate ratings should
be used when addressing this concern.
Reliable Ground
A reliable ground must be maintained at all times. To ensure this, the rack itself should be
grounded. Particular attention should be given to power supply connections other than the
direct connections to the branch circuit (i.e. the use of power strips, etc.).
special precautions to ensure that the system remains stable. The following guidelines
are provided to ensure your safety:
• Load the rack from the bottom to the top with the heaviest component at the bottom of the
rack. If this unit is the only unit in the rack, it should be mounted at the bottom of the rack.
• If the rack is provided with stabilizing devices, install the stabilizers before mounting or
servicing the unit in the rack.
• Slide rail mounted equipment is not to be used as a shelf or a workspace.
• Do not pick up the server with the front handles. They are designed to pull the system
from a rack only.
Particulate and Gaseous Contamination Limits
Data centers should meet the following requirements to maintain proper air quality.
Particulate Contamination Specications
All sources of dust inside data centers should be reduced or eliminated. Dust having a
deliquescent relative humidity of less than the maximum allowable relative humidity should
The cleanliness of data centers must adhere to ISO Standard 14644-1 Class 8 (ISO 2015)
• Each cubic meter of air should contain no more than 3,520,000 particles that are equal to
or greater than 0.5 µm in diameter.
• Each cubic meter of air should contain no more than 832,000 particles that are equal to
or greater than 1 µm in diameter.
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