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.
•
The rack should use the universal mounting rail hole pattern that is identified in IEC Standard 297.
•
The rack should have designated earth grounding connections (typically on the base).
•
The rack must meet earthquake safety requirements equal to that of the installed chassis.
•
The mounting holes should be flush with the rails to accommodate the chassis.
•
The rack should support approximately 270 kg (600 lb).
Grounding the Rack
The rack must be properly grounded.
Use a rack grounding kit and a ground conductor that is carried back to earth or to another suitable
building ground.
At a minimum, follow these guidelines to ground equipment racks to the earth ground:
•
CAD weld appropriate wire terminals to building I-beams or earth ground rods.
•
For a DC-powered switch, use a minimum 14 AWG stranded copper wire for grounding.
AC-powered switches do not need separate chassis grounding.
•
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 for your specific
installation.
Providing Adequate Space for the Rack
Provide enough space in front of and behind the equipment, so that you can service it easily and so that
airflow is not impeded.
We recommend providing a minimum of 122 cm (48 in) in front of the rack and 76 cm (30 in) behind the
rack. When using a relay (two-post) rack, provide a minimum of 61 cm (24 in) of space behind the
mounted equipment. Extra room on each side is optional.
Note
The equipment does not have a switch for turning power on and off. For systems using an AC
power supply, power to the switch is disconnected by removing the wall plug from the
electrical outlet.
Be sure that cables and other equipment do not block the switch's air intake or outflow.
Preparing to Install
VSP 4900 Series Switches: Hardware Installation Guide
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