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C-4
A
PPENDIX
C: S
ITE
R
EQUIREMENTS
Use an open style, 19-inch rack. The rack styles shown in Figure C-1
facilitate easy maintenance and provide excellent ventilation.
The rack should use the universal mounting rail hole pattern identified
in IEC Standard 297.
The rack should be made of steel.
The rack should support approximately 272 kilograms (600 pounds).
The rack should have adequate electrical grounding. A distribution
rack grounding kit may be used.
The rack should be attached to the wiring closet floor with 9.5
millimeters (3/8 inch) lag screws or equivalent hardware. The floor
under the rack should be level within 5 millimeters (3/16 inch). Use a
floor leveling cement compound if necessary or bolt the racks to the
floor.
Brace open racks if the channel thickness is less than 6.4 millimeters
(1/4 inch).
Install equipment in the lower half of the equipment rack to avoid
making the rack top too heavy.