4 QXS G2 Hardware Installation and Maintenance Guide
CAUTION: To avoid danger of the rack falling over, under no circumstances should more than one
chassis be moved out of the cabinet at any one time.
• The system must be operated with low pressure rear exhaust installation.
The back pressure created by rack doors and obstacles is not to exceed 5 pascals (0.5 mm water
gauge).
• The rack design should take into consideration the maximum operating ambient temperature for
the chassis, which is 35ºC (95ºF) for RAID chassis and 40ºC (104ºF) for expansion chassis.
• The rack should have a safe electrical distribution system.
• It must provide over-current protection for the chassis and must not be overloaded by the total
number of chassis installed in the rack.
• When addressing these concerns, consideration should be given to the electrical power
consumption rating shown on the nameplate.
• The electrical distribution system must provide a reliable earth connection for each chassis in the
rack.
• Each PSU in each chassis has an earth leakage current of 1.0mA. The design of the electrical
distribution system must take into consideration the total earth leakage current from all the PSUs
in all the chassis.
• The rack will require labeling with “High Leakage Current. Earth connection essential before
connecting supply.”
• The rack—when configured with the chassis—must meet the safety requirements of UL 60950-1
and IEC 60950-1.
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