General Site Requirements - 3Com 7754 Installation Manual

38 C 2: I
HAPTER NSTALLING
Electrical Safety
Moving the Switch
Laser Safety
General Site
Requirements
T S 7750
HE WITCH
During the installation, wear an antistatic wrist strap and antistatic gloves. See
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"Static Electricity" on page 39 for additional information on preventing static.
WARNING: Follow local safety regulations when performing any operation with
the Switch 7750. Follow the related safety information and special safety
instructions provided by 3Com. 3Com bears no responsibility for accidents that
occur due to violations of safe operation requirements.
To maintain electrical safety, note the following recommendations:
Look carefully for possible hazards in your work area, such as ungrounded
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power extension cables, missing safety grounds, and moist floors.
Locate the emergency power-off switch in the room where you are working.
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Shut the power off at once in the event of an accident.
Unplug all the power cords and external cables before moving the chassis.
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Never assume that power is disconnected from a circuit. Always check.
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Use caution when moving the Switch 7750. Note the following recommendations
when moving the switch:
Do not move the switch alone. Work with another person.
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Move the switch slowly. Never move suddenly or twist your body.
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Always disconnect all external cables (including power cord) before lifting or
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moving the chassis.
Do not hold the power handles when carrying the switch.
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Do not put fingers into the vent of the chassis when carrying the switch.
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Since the power handles and vent have not been designed to bear the weight
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of the entire chassis, using them to carry the switch may damage the switch or
even injure personnel.
Some I/O modules on the Switch 7750 have optical ports. Make sure that an
optical connector is connected to the optical ports, or a dust proof cover is fitted,
as invisible laser radiation can be emitted from the port.
WARNING: Never look at the transmit LED/laser through a magnifying device
while it is powered on. Never look directly at the fiber TX port and fiber cable ends
when they are powered on.
The environment of the installation site influences the performance and lifetime of
the switch. The installation site for your switch should meet the requirements
described in the following sections.
Temperature and Humidity
To ensure normal operation and to prolong the operational lifetime of the switch,
the temperature and humidity of the equipment room must be within controlled
limits. The requirements for the temperature and humidity of the switch
installation site are listed in Table 47.