NETGEAR M6100 Hardware Installation Manual page 28

The rack must support approximately 600 pounds (272 kilograms).
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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.
All switches are designed with mounting brackets that provide a solid metal-to-metal
connection to the rack. If you do not use equipment racks, you can attach wiring terminals
directly to the mounting brackets for appropriate grounding. There are grounding terminals
that are mounted on the back of the chassis.
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 the appropriate chassis grounding wire for your system, which depends on the
•
available input current to the power supply.
For AC systems using a 20A breaker per PSU (SSI AC), the chassis ground can be
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as small as 14 AWG. Use a power cable ground that is the same size as the primary.
For DC systems using a 15A breaker per PSU, the chassis ground can be as small as
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14 AWG. Use a power cable ground that is the same size as the primary.
For DC systems using a 40A breaker per PSU (SSI DC), the chassis ground can be
-
as small as 10 AWG. Use a power cable ground that is the same size as the primary.
For complete details on power supplies and power supply cords, see
Note:
Chapter 3, Power Supply Units
Supply Cords.
Drill and tap wire terminals to equipment racks.
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Position the earth ground as close to the equipment rack as possible to maintain the
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shortest wiring distance possible.
Use a ground impedance tester or micro-ohm meter to test the quality of earth ground
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connection at the chassis. This ensures good grounding between the chassis, rack, and
earth ground.
Because building codes vary worldwide, NETGEAR strongly
Note:
recommends that you consult an electrical contractor to ensure proper
equipment grounding for your specific installation.
Space Requirements 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 24 inches (61 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.
NETGEAR M6100 Switch Chassis
and
Appendix A, Selecting Power
Site Preparation
28