Installation manual

Rack Specifications and Recommendations
Racks should conform to conventional standards. In the United States, use EIA Standard RS-310C:
Racks, Panels, and Associated Equipment.
In countries other than the United States, use IEC Standard 297. In addition, verify that your rack meets
the basic mechanical, space, and earthquake requirements that are described in this section.
Mechanical Recommendations for the Rack
Use equipment racks that meet the following mechanical recommendations:
•
Use an open style, 19-inch rack to facilitate easy maintenance and to provide proper ventilation.
•
Use a rack made of steel or aluminum.
•
Use the universal mounting rail hole pattern that is identified in IEC Standard 297.
•
Ensure the rack has designated earth grounding connections (typically on the base).
•
Ensure the rack must meet earthquake safety requirements equal to that of the installed chassis.
•
Ensure the mounting holes are flush with the rails to accommodate the chassis.
•
Ensure the rack supports approximately 1260 pounds (572 kg).
Using Protective Grounding for the Rack
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. Extreme Networks switches have grounding
terminals that are mounted on the back of the chassis.
Note
Because building codes vary worldwide, We strongly recommend that you consult an
electrical contractor to ensure proper equipment grounding for your specific installation.
At a minimum, follow these guidelines to ground equipment racks to the earth ground:
1 CAD weld appropriate wire terminals to building I-beams or earth ground rods.
2 Use the appropriate chassis grounding wire for your system; the correct size depends on the
available input current to the power supply. For AC systems using a 20A breaker per PSU, the
chassis ground can be as small as 14 AWG. The power cable ground should be the same size as the
primary.
Note
For complete details on power supplies and power supply cords, refer to Power Supplies
and to Selecting Power Supply Cords on page 106. Drill and tap wire terminals to
equipment racks.
3 Position the earth ground as close to the equipment rack as possible to maintain the shortest wiring
distance possible.
4 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.
Preparing Your Site
BlackDiamond X Series Switches Hardware Installation Manual 37