Cisco WS-C2950-12 Hardware Installation Manual page 51

Chapter 2 Installation
The plug-socket combination must be accessible at all times because it serves
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as the main disconnecting device.
To prevent the switch from overheating, do not operate it in an area that
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exceeds the maximum recommended ambient temperature of 113 F (45 C). To
prevent airflow restriction, allow at least 3 inches (7.6 cm) of clearance around
the ventilation openings.
When installing the unit, always make the ground connection first and
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disconnect it last.
This equipment is intended to be grounded. Ensure that the host is connected to
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earth ground during normal use.
Before working on equipment that is connected to power lines, remove jewelry
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(including rings, necklaces, and watches). Metal objects will heat up when
connected to power and ground and can cause serious burns or weld the metal
object to the terminals.
Warning Do not work on the system or connect or disconnect cables during periods of
lightning activity.
Warning Ultimate disposal of this product should be handled according to all national
laws and regulations.
Warning Attach only the Cisco RPS (model PWR300-AC-RPS-N1) to the RPS receptacle.
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Catalyst 2950 Desktop Switch Hardware Installation Guide
Preparing for Installation
2-3