Extreme Networks Summit 300-24 Hardware Installation Manual page 40

Site Preparation
• Install equipment into the lower half of the rack first to avoid making the rack top-heavy.
• The rack should support approximately 600 pounds (272 kilograms).
Protective Grounding for the Rack (Alpine and BlackDiamond Switches)
Adequate grounding for Summit switches is provided through the power cord. No additional
grounding of the rack is required. For Alpine and BlackDiamond switches, follow the recommendations
in this section.
Use a rack grounding kit and a ground conductor that is carried back to earth or to another suitable
building ground.
All Extreme Networks switches are designed with mounting brackets that provide solid metal-to-metal
connection to the rack. If you do not use equipment racks, you can attach wiring terminals directly to
the mounting brackets for appropriate grounding. Alpine and BlackDiamond products have grounding
terminals that are mounted on the back of the chassis.
At a minimum, follow these guidelines:
• Ground equipment racks to earth ground.
— Use the same gauge copper wire for grounding as that used for the power input cable.
— Drill and tap wire terminals to equipment racks.
— Position the earth ground as close to the equipment rack as possible to maintain the shortest
wiring distance possible.
— Use a ground impedance tester or micro-ohm meter to test the quality of earth ground connection
at the chassis. This will ensure good grounding between the chassis, rack, and earth ground.
NOTE
Because building codes vary worldwide, Extreme Networks strongly recommends that you consult an
electrical contractor to ensure proper equipment grounding is in place for your specific installation.
• Ground DC power supplies to earth ground by using the grounding terminals provided.
Space Requirements for the Rack
Provide enough space in front of and behind the switch so that you can service it easily. Allow a
minimum of 48 inches (122 cm) in front of the rack and 24 inches (61 cm) behind the rack. When using a
relay rack, provide a minimum of 24 inches (61 cm) of space behind the mounted equipment. Extra
room on each side is optional.
NOTE
Install your equipment rack near an easily accessible power outlet. When you need to disconnect the
power cable from your switch, remove it first from the power source and then from the switch.
Securing the Rack
The rack should be attached to the wiring closet floor with 3/8 inch (9.5 mm) lag screws or equivalent
hardware. The floor under the rack should be level within 3/16 inch
(5 mm). Use a floor-leveling cement compound if necessary or bolt the racks to the floor as shown in
Figure 8.
40 Extreme Networks Consolidated "i" and "e" Series Hardware Installation Guide