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Chapter 2: Site Preparation
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.
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.
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Use a minimum 14 AWG stranded copper wire for grounding an E4G-200 router or a DC-powered
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E4G-400 router.
An AC-powered E4G-400 router does not need separate chassis grounding.
Position the earth ground as close to the equipment rack as possible to maintain the shortest wiring
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distance possible.
Use a ground impedance tester or micro-ohm meter to test the quality of earth ground connection at
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the chassis. This will ensure good grounding between the chassis, rack, and earth ground.
Extreme Networks equipment is designed with mounting brackets that provide solid metal-to-metal
connection to the rack. Before you install an E4G series router in an equipment rack, clean the rack and
mounting bracket surfaces and apply an antioxidant. When you secure an E4G series router to the rack,
use thread-forming mounting screws that remove any paint or non-conductive coatings and establish
metal-to-metal contact.
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.
Space Requirements for an E4G-400 Router
Provide enough space in front of and behind the router so that you can service it easily. Allow a
minimum of 48 inches (122 cm) in front of the rack and 30 inches (76 cm) behind the rack. When using a
relay (two-post) rack, provide a minimum of 24 inches (61 cm) of space behind the mounted equipment.
Extra room on each side is optional.
Securing the Rack
The rack should be attached to the 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
34
Figure
11.
E4G Series Routers Hardware Installation Guide
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