Distribution Rack Requirements; Protective Grounding For The Rack; Space Requirements For The Rack - 3Com SuperStack II 10005622 Getting Started Manual

B-2 A B: S R
PPENDIX ITE EQUIREMENTS AND
Be sure that each wiring closet has a suitable
ground. Ground all metal racks, enclosures, boxes,
and raceways in the closet.
Use AC power, 15-ampere service receptacles, type
N5/15 or NEMA 5-15R for 120 VAC, and the other
system specifications shown in Appendix A.
Be especially sure to meet all system environmental
requirements in Appendix A, such as ambient
temperature and humidity.
Be sure that the ventilation in the wiring closet is
adequate to maintain a temperature below 40 ˚C
(104 ˚F).
Install a reliable air conditioning and ventilation
system if you plan to have two or more Switch
3900 systems in a single wiring closet.
To prevent overheating during nonbusiness hours,
guard against the ventilation being shut down
while a Switch 3900 system remains powered up.
S C
AFETY ODES

Distribution Rack Requirements

If you plan to mount your SuperStack II Switch 3900
systems in a distribution rack, verify that your rack
meets the basic mechanical and space requirements
described in this section.

Protective Grounding for the Rack

To ensure that voltages induced into wiring by
lightning or other disturbances are directed to
ground, ground your distribution racks properly. Use a
distribution rack grounding kit and a ground
conductor that is carried back to earth or to another
suitable building ground. To order the grounding kit,
contact your sales representative.

Space Requirements for the Rack

Provide enough space in front of and behind the
system so that you can service it easily. Allow a
minimum of 76 cm (30 in.) between the rack and any
wall behind or in front of it. Extra room on each side
is optional. See Figure B-1.
Install your distribution rack near an easily accessible
power outlet. You can power down the system only
by removing the power cord from the power source.