108
A
PPENDIX
C: S
ITE
R
EQUIREMENTS
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Use an open style, 19-inch rack. The rack styles shown in Figure 16
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.
