Cisco NAC3350-PROF-K9 - NAC Profiler Server Installation Manual page 46

Safety Guidelines
To avoid electric shock, do not connect safety extra-low voltage (SELV) circuits to telephone-network
Warning
voltage (TNV) circuits. LAN ports contain SELV circuits, and WAN ports contain TNV circuits. Some
LAN and WAN ports both use RJ-45 connectors. Statement 1021
Do not touch the power supply when the power cord is connected. For systems with a power switch,
Warning
line voltages are present within the power supply even when the power switch is off and the power
cord is connected. For systems without a power switch, line voltages are present within the power
supply when the power cord is connected. Statement 4
Before working on equipment that is connected to power lines, remove jewelry (including rings,
Warning
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. Statement 43
Warning Before working on a chassis or working near power supplies, unplug the power cord on AC units;
disconnect the power at the circuit breaker on DC units. Statement 12
Warning Do not work on the system or connect or disconnect cables during periods of lightning activity.
Statement 1001
This equipment is intended to be grounded. Ensure that the host is connected to earth ground during
Warning
normal use. Statement 39
When installing or replacing the unit, the ground connection must always be made first and
Warning
disconnected last. Statement 1046
Follow these guidelines when working on equipment powered by electricity:
Locate the room's emergency power-off switch. Then, if an electrical accident occurs, you can
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quickly turn off the power.
Disconnect all power before doing the following:
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Never install equipment that appears damaged.
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Carefully examine your work area for possible hazards, such as moist floors, ungrounded power
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extension cables, and missing safety grounds.
Never assume that power is disconnected from a circuit; always check.
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Never perform any action that creates a potential hazard to people or makes the equipment unsafe.
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Never work alone when potentially hazardous conditions exist.
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Cisco NAC Appliance Hardware Installation Guide
2-4
Working on or near power supplies.
Installing or removing an appliance.
Performing most hardware upgrades.
Chapter 2 Preparing for Installation
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