Dell POWEREDGE 300 User Manual download pdf (Page 32)

30 Two-Post Rack Installation

Installation Tasks

Installing a two-post rack kit includes performing the following tasks in order:

Marking the rack

• Universal-hole spacing rack

• Wide-hole spacing rack

Installing the mounting rails in the rack

• Center-mount installation

• Flush-mount installation

Installing the system in the rack

Routing cables

Marking the Rack

You must allow 1 U (44 mm, or 1.75 inch) of vertical space for each system that you install in the two-post

rack.

Universal-Hole Spacing Racks

Racks with universal-hole spacing 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 column of holes (see Figure 2-2).

Figure 2-2. Two-Post, Open-Frame Relay Rack Universal-Hole Spacing

12.7 mm (0.5 inch)

15.9 mm (0.625 inch)

1 U (44 mm or 1.75 inches)

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Dell POWEREDGE 300 User Manual Page 32