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Ground 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, consult an electrical contractor to

ensure proper equipment grounding for your specic 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 airow 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 outow.

Secure the Rack

The rack should be attached to the wiring closet oor with 9.5 mm (3/8 in) lag screws or

equivalent hardware. The oor under the rack should be level within 5 mm (3/16 in). Use

a oor-leveling cement compound if necessary or bolt the racks to the oor as shown.

Ground the Rack Preparing to Install

34 VSP 4900 Series Switches: Hardware Installation Guide

Extreme Networks VSP 4900 Series User Manual

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