Configuration factors 6
Power requirements
When planning for power distribution requirements for your rack configuration:
• The power load must be balanced between available AC supply branch circuits.
• The overall system AC current load must not exceed 80% of the branch circuit AC current rating.
• If a UPS is used, the load should not exceed 80% of the marked electrical current rating for the UPS.
This equipment must be installed in accordance with local and regional electrical regulations governing
the installation of information technology equipment by licensed electricians. This equipment is designed
to operate in installations covered by the Nation Electric Code (ANSI/NFPA-70, 1993) and the code for
protection of Electronic Computer/Data Processing Equipment (NFPA-75, 1992).
For electrical power ratings on options, refer to the products rating label or user documentation supplied
with that option.
Temperature requirements
To ensure continued safe and reliable equipment operation, install or position the rack in a well
ventilated, climate-controlled environment.
The operating temperature inside the rack is always higher than the room temperature and is dependent
on the configuration of equipment in the rack. Check the TMRA for each piece of equipment before
installation.
CAUTION: To reduce the risk of damage to the equipment when installing third-party options:
• Do not permit optional equipment to impede airflow around the component or to increase
the internal rack temperature beyond the maximum allowable limits.
• Do not exceed the manufacturer’s TMRA.
Airflow requirements
HP rack-mountable products typically draw in cool air through the front and exhaust warm air out through
the rear of the rack. The front door of the rack, therefore, must be adequately ventilated to enable
ambient room air to enter the rack, and the rear door must be adequately ventilated to enable the warm
air to escape the rack. Do not block the ventilation apertures.
Blanking panels
If the front of the rack is not completely filled with components, the remaining gaps between the
components can cause changes in the airflow, which can adversely affect cooling within the rack. Cover
these gaps with blanking panels.
Populating your new rack
Before populating your new rack, you must plan the placement of each component. Factors of each
component, such as weight, accessibility, power, temperature, and airflow requirements affect installation
order and component placement in the rack.
Apply the following rules to the physical placement of components in the HP 10000 G2 Series Rack:
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