Dell PowerConnect J-EX4200 Hardware Manual page 109

Before mounting a J-EX4200 switch on two posts in a rack:
Verify that the site meets the requirements described in "Site Preparation Checklist
for J-EX4200 Switches" on page 57.
Place the rack in its permanent location, allowing adequate clearance for airflow and
maintenance, and secure it to the building structure.
Read "General Safety Guidelines and Warnings for J-EX Series Switches" on page 171,
with particular attention to "Chassis Lifting Guidelines for J-EX4200 Switches" on
page 184.
Remove the switch from the shipping carton (see "Unpacking a J-EX4200 Switch" on
page 88).
Ensure that you have the following parts and tools available:
Phillips (+) screwdriver, number 2
Flat-blade (-) screwdriver if you are installing the switch in a rack with square,
nonthreaded holes
2 mounting brackets and 8 mounting screws (provided in the accessory box shipped
with the switch)
4 screws—and 4 cage nuts and washers if your rack requires them—of the appropriate
size to secure the chassis to the rack (provided)
2-in.-recess front brackets if you will mount the switch in a recessed position (brackets
are from the separately orderable four-post rack-mount kit).
Dust covers for ports (for J-EX4200-24F switches only; optional)
NOTE: One person must be available to lift the switch while another secures
the switch to the rack.
CAUTION: If you are mounting multiple switches on a rack, mount a switch
in the bottom of the rack first and proceed to mount the rest of the switches
from bottom to top.
To mount the switch on two posts in a rack:
If your rack has unthreaded round or square holes:
1.
Determine the location on the rack where you want to mount the switch, and install
a.
2 cage nuts in the appropriate holes in each rack post.
Use Figure 27 on page 94 or Figure 28 on page 94 to help you with cage-nut
installation.
Chapter 9: Installing the Switch
93