Cisco Catalyst 2955 Hardware Installation Manual page 139

Chapter 4 Installation in a Hazardous Environment
In switch installations in a hazardous location, the DC power source could be
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located away from the vicinity of the switch. be sure that power is removed and
power cannot be accidentally be turned on or the area is nonhazardous before
proceeding. Statement 1059
If you connect or disconnect the console cable with power applied to the
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switch or any device on the network, an electrical arc can occur. This could
cause an explosion in hazardous location installations. Be sure that power is
removed or the area is nonhazardous before proceeding.
To verify switch operation, perform POST on the switch in a nonhazardous
location before installation. Statement 1065
Do not connect or disconnect cables to the ports while power is applied to the
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switch or any device on the network because an electrical arc can occur. This
could cause an explosion in hazardous location installations. Be sure that
power is removed from the switch and cannot be accidentally be turned on, or
verify that the area is nonhazardous before proceeding. Statement 1070
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 140°F (60°C). To
prevent airflow restriction, allow at least 3 inches (7.6 cm) of clearance around
the ventilation openings. Statement 17C
When used in a Class I, Division 2, hazardous location, this equipment must be
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mounted in a suitable enclosure with proper wiring method, for all power, input
and output wiring, that complies with the governing electrical codes and in
accordance with the authority having jurisdiction over Class I, Division 2
installations. Statement 1066
When installing the unit, always make the ground connection first and
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disconnect it last. Statement 42
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Catalyst 2955 Hardware Installation Guide
Preparing for Installation
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