Leveling An Enclosure Rack - Seagate Exos E 4U106 Hardware Installation And Maintenance Manual

CAUTION: To avoid danger of the rack falling over, under no circumstances should more than one enclosure 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 enclosure,
which is 35ºC (95ºF) for JBODS/EBODs. Above an altitude of 900 meters, derating applies as per ASHRAE
Class A2.
• The rack should have a safe electrical distribution system. It must provide over-current protection for the
enclosure and must not be overloaded by the total number of enclosures 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 enclosure in the rack.
• Each power supply line cord will have an earth leakage current of 1mA. The design of the electrical distribution
system must take into consideration the total earth leakage current from all the PSUs in all the enclosures. The
rack will require labeling with "High Leakage Current. Earth connection essential before connecting supply."
• The rack—when configured with the enclosures—must meet the safety requirements of UL2416, UL60950-1,
and IEC 60950-1.

Leveling an enclosure rack

The rack should be installed on a flat, leveled surface. It should not rest inclined under any circumstances as this
could cause uneven stress on the rack structure, and also on the ground. Enclosures placed in such uneven racks
resist smooth movement in the racks while pushing them in or pulling them out. This can eventually damage the
enclosure rails. For safe operation, follow the leveling instructions as prescribed by the rack manufacturer in the
rack documentation.
CAUTION: Do not install any enclosures into a rack until and unless racks are leveled.
14 Safety guidelines