Dell PowerEdge 2650 Rack Installation Guide - Page 12

Removing the Rack Doors, Marking the Rack

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www.dell.com | support.dell.com 4 Installing the system in the rack 5 Installing the cable-management arm 6 Routing cables 7 Replacing the rack doors Removing the Rack Doors See the procedures for removing doors in the documentation provided with your rack cabinet. CAUTION: Because of the size and weight of the rack cabinet doors, never attempt to remove or install them by yourself. CAUTION: Store the two doors where they will not injure someone if the doors accidently fall over. Marking the Rack You must allow 2 U (88 mm, or 3.5 inches) of vertical space for each system you install in the rack. Rack cabinets that meet EIA-310 standards have an alternating pattern of three holes per rack unit with center-to-center hole spacing (beginning at the top hole of a 1-U space) of 15.9 mm, 15.9 mm, and 12.7 mm (0.625 inch, 0.625 inch, and 0.5 inch) for the front and back vertical rails (see Figure 1-3). Rack cabinets may have round or square holes. NOTE: The vertical rails may be marked by horizontal lines and numbers in 1-U increments. If you wish, you can make a note of the number marking on the rack's vertical rail. It is not necessary to mark or place tape on the rack. If you choose this method, skip ahead to the procedure "Installing the RapidRails Slide Assemblies." 1-6 Rack Installation Guide

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1-6
Rack Installation Guide
www.dell.com | support.dell.com
4
Installing the system in the rack
5
Installing the cable-management arm
6
Routing cables
7
Replacing the rack doors
Removing the Rack Doors
See the procedures for removing doors in the documentation provided with your rack
cabinet.
CAUTION: Because of the size and weight of the rack cabinet doors, never
attempt to remove or install them by yourself.
CAUTION: Store the two doors where they will not injure someone if the doors
accidently fall over.
Marking the Rack
You must allow 2 U (88 mm, or 3.5 inches) of vertical space for each system you install in
the rack. Rack cabinets that meet EIA-310 standards have an alternating pattern of three
holes per rack unit with center-to-center hole spacing (beginning at the top hole of a 1-U
space) of 15.9 mm, 15.9 mm, and 12.7 mm (0.625 inch, 0.625 inch, and 0.5 inch) for the
front and back vertical rails (see Figure 1-3). Rack cabinets may have round or square holes.
NOTE:
The vertical rails may be marked by horizontal lines and numbers in 1-U
increments. If you wish, you can make a note of the number marking on the rack’s
vertical rail. It is not necessary to mark or place tape on the rack. If you choose this
method, skip ahead to the procedure "Installing the RapidRails Slide Assemblies."