Installation Guide

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, 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 switch 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.
Warning
Extreme Networks switches do not have a switch for turning power to the unit on and o. 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.
Warning
The DC-powered switches include the following models:
• X440-G2-24t-10GE4-DC and X440-G2-48t-10GE4-DC
For these switches and the EPS-150DC power supply, turn o power to the chassis by de-
energizing the circuit that feeds the power supply. This is usually accomplished by turning o
a circuit breaker. Disconnecting the DC power cable from the DC power source must be done
by a qualified, licensed electrician.
Depending on other conditions in the equipment room, it may be possible to install the switches closer
to each other; consult your Extreme Networks Customer Support representative for guidance.
Site Preparation
Grounding the Rack
ExtremeSwitching Hardware Installation Guide 169