Dell PowerConnect 3024 User Manual page 73

system, observe the following guidelines:
Install the power supply before connecting the power cable to the power supply.
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Unplug the power cable before removing the power supply.
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If the system has multiple sources of power, disconnect power from the system by unplugging
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all power cables from the power supplies.
Move products with care; ensure that all casters and/or stabilizers are firmly connected to the system.
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Avoid sudden stops and uneven surfaces.
Rack Mounting of Systems
Observe the following precautions for rack stability and safety. Also refer to the rack installation
documentation accompanying the system and the rack for specific caution statements and procedures.
Systems are considered to be components in a rack. Thus, "component" refers to any system as well as to
various peripherals or supporting hardware.
CAUTION: Installing systems in a rack without the front and side stabilizers installed could cause
the rack to tip over, potentially resulting in bodily injury under certain circumstances. Therefore,
always install the stabilizers before installing components in the rack.
After installing system/components in a rack, never pull more than one component out of the rack
on its slide assemblies at one time. The weight of more than one extended component could cause
the rack to tip over and may result in serious injury.
NOTE: Your system is safety-certified as a free-standing unit and as a component for use in a Dell rack
cabinet using the customer rack kit. The installation of your system and rack kit in any other rack cabinet has
not been approved by any safety agencies. It is your responsibility to have the final combination of system
and rack kit in a rack cabinet evaluated for suitability by a certified safety agency. Dell disclaims all liability
and warranties in connection with such combinations.
System rack kits are intended to be installed in a rack by trained service technicians. If you install the
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kit in any other rack, be sure that the rack meets the specifications of a Dell rack.
CAUTION: Do not move racks by yourself. Due to the height and weight of the rack, a minimum of
two people should accomplish this task.
Before working on the rack, make sure that the stabilizers are secured to the rack, extended to the
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floor, and that the full weight of the rack rests on the floor. Install front and side stabilizers on a single
rack or front stabilizers for joined multiple racks before working on the rack.
Always load the rack from the bottom up, and load the heaviest item in the rack first.
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Make sure that the rack is level and stable before extending a component from the rack.
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Use caution when pressing the component rail release latches and sliding a component into or out of
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a rack; the slide rails can pinch your fingers.
After a component is inserted into the rack, carefully extend the rail into a locking position, and then
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slide the component into the rack.
Do not overload the AC supply branch circuit that provides power to the rack. The total rack load
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should not exceed 80 percent of the branch circuit rating.
Ensure that proper airflow is provided to components in the rack.
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Do not step on or stand on any component when servicing other components in a rack.
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CAUTION: A qualified electrician must perform all connections to DC power and to safety grounds.
All electrical wiring must comply with applicable local or national codes and practices.
CAUTION: Never defeat the ground conductor or operate the equipment in the absence of a
suitably installed ground conductor. Contact the appropriate electrical inspection authority or an
electrician if you are uncertain that suitable grounding is available.
CAUTION: The system chassis must be positively grounded to the rack cabinet frame. Do not
attempt to connect power to the system until grounding cables are connected. Completed power
and safety ground wiring must be inspected by a qualified electrical inspector. An energy hazard
will exist if the safety ground cable is omitted or disconnected.
Modems, Telecommunications, or Local Area Network Options
Do not connect or use a modem during a lightning storm. There may be a risk of electrical shock from
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lightning.