Installation guide

Meeting Power Requirements
BlackDiamond 20808 Switch Hardware Installation Guide
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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.
● Use the appropriate chassis grounding wire for your system. The appropriate wire selection depends
on the available input current to the power supply.
■ For AC systems using a 20A breaker per PSU, the minimum size for the chassis ground is
14 AWG. The power cable ground should be the same size as the primary.
■ For DC systems using a 55A breaker per PSU, the minimum size of the chassis ground is
4 AWG. The power cable ground should be the same size as the primary.
NOTE
For complete details about power supplies and power supply cords, refer to Chapter 3, “BlackDiamond 20808 Power
Supplies,”and “Selecting Power Supply Cords” on page 116 in Appendix A. Drill and tap wire terminals to
equipment racks.
● Position the earth ground as close to the equipment rack as possible to maintain the shortest possible
wiring distance.
● 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 rack.
The rack should be attached to the wiring closet 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-levelling
cement compound if necessary or bolt the racks to the floor.
Brace open equipment racks if the channel thickness is less than 1/4 inch (6.4 mm).
Meeting Power Requirements
This section describes power requirements, including:
● Power Supply Requirements
● AC Power Cord Requirements
● Uninterruptible Power Supply Requirements
Power Supply Requirements
Adhere to the following requirements to operate your Extreme Networks equipment safely:
● Be sure that your equipment is placed in an area that accommodates the power consumption and
component heat dissipation specifications.
● Be sure that your power source meets the site power or AC power requirements of the network
equipment.