3Com 7750 Series Manual do utilizador - Página 10

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3Com 7750 Series Manual do utilizador
PoE Power Rack Installation Guide
This unit must be installed, serviced, and operated only by skilled and qualified personnel who have the
necessary knowledge and practical experience with electrical equipment and who understand the
hazards that can arise when working on this equipment.
The PoE Power Rack can be powered by multiple AC inputs, ensure that the appropriate circuit
protection device for each AC input being serviced is disconnected before changing or servicing a Power
Supply Module. If servicing the PoE Power Rack, all the AC power cords must be removed from the
equipment.
High leakage currents may be possible on this type of equipment. Make sure the equipment is properly
grounded before connecting AC input power. Use only properly grounded AC power cords.
Hazardous energy and voltages are present in the device and on the DC output cables that can shock or
cause serious injury. Follow all safety warnings and practices when servicing this equipment. Insure that
the PoE Power Rack AC power cords are unplugged from the PoE Power Rack before connecting the
DC output cables to the PoE Power Rack and the Switch 7750.
Exercise care when servicing this area.
In addition to adhering to the safety procedures, the following are some basic precautions that should always
be used:
Use only properly insulated tools.
Remove all metallic objects (key chains, glasses, rings, watches, or jewelry.
Wear safety glasses.
Test circuits before touching.
Lock out and tag any circuit breakers/fuses when possible to prevent accidental turn on.
Be aware of potential hazards before servicing equipment.
Identify exposed hazardous electrical potentials on connectors or, wiring. (Note the condition of these
circuits, especially any wiring).
Be careful when removing or replacing any covers – avoid contacting with any circuits.
3-2
Chapter 3 Safety