3Com 3C16896 8 slot AC Chassis General Site, Requirements, Electrical Safety, Moving the Switch

38CHAPTER 2: INSTALLING THE SWITCH 7750

■During the installation, wear an antistatic wrist strap and antistatic gloves. See “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.

Electrical Safety	To maintain electrical safety, note the following recommendations:
	■ Look carefully for possible hazards in your work area, such as ungrounded
	power extension cables, missing safety grounds, and moist floors.
	■ Locate the emergency power-off switch in the room where you are working.
	Shut the power off at once in the event of an accident.
	■ Unplug all the power cords and external cables before moving the chassis.
	■ Never assume that power is disconnected from a circuit. Always check.
Moving the Switch	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.
	■ Move the switch slowly. Never move suddenly or twist your body.
	■ Always disconnect all external cables (including power cord) before lifting or
	moving the chassis.
	■ Do not hold the power handles when carrying the switch.
	■ Do not put fingers into the vent of the chassis when carrying the switch.
	■ Since the power handles and vent have not been designed to bear the weight
	of the entire chassis, using them to carry the switch may damage the switch or
	even injure personnel.
Laser Safety	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.
General Site	The environment of the installation site influences the performance and lifetime of
Requirements	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.