Figure 2-1. Eia Square-Hole Pattern On The Vertical Rail - NEC Express5800/320Ma Installation Manual

Figure 2-1. EIA Square-Hole Pattern on the Vertical Rail

1U
5/8 in. (1.59 cm)
1U
5/8 in. (1.59 cm)
1/2 in. (1.27 cm)
If your rack is not already numbered, use a marker or pencil to number the middle hole
of at least the following:
•
The 4U in which to install each system
•
The 1U in which to install a keyboard, video, and mouse (KVM) switch, if ordered
The following instructions direct you to start numbering the middle hole of the third U in
the cabinet, which is the eighth hole, to leave room at the bottom of the cabinet for the
PDUs.
To number the vertical rails in a cabinet
1. On each of the front rails, number the middle hole of the 4U where you will install
the system. In Figure
numbered.
2-2, the middle hole of the third, fourth, fifth, and sixth Us are
Installing a Rack-Mounted System
Installing a Rack-Mountable System 2-3