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Safety Guidelines
Follow these guidelines when you work on equipment powered by electricity.
Locate the emergency power-off switch for the room in which you are working. Then, if an electrical
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accident occurs, you can act quickly to turn off the power.
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Before working on the system, unplug the power cord.
Disconnect all power before doing the following:
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Before working on a system that has an on/off switch, turn OFF the power and unplug the power cord.
Warning
Statement 1
Before working on a chassis or working near power supplies, unplug the power cord on AC units;
Warning
disconnect the power at the circuit breaker on DC units. Statement 12
Warning
When installing or replacing the unit, the ground connection must always be made first and
disconnected last. Statement 1046
Do not work alone if potentially hazardous conditions exist.
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Never assume that power is disconnected from a circuit. Always check.
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Look carefully for possible hazards in your work area, such as moist floors, ungrounded power
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extension cables, frayed power cords, and missing safety grounds.
If an electrical accident occurs, proceed as follows:
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In addition, use the guidelines that follow when working with any equipment that is disconnected from
a power source, but still connected to telephone wiring or other network cabling.
Never install telephone wiring during a lightning storm.
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Never install telephone jacks in wet locations unless the jack is specifically designed for wet
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locations.
Never touch uninsulated telephone wires or terminals unless the telephone line has been
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disconnected at the network interface.
Use caution when installing or modifying telephone lines.
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Cisco uBR7100 Series and Cisco uBR7100E Series Universal Broadband Router Hardware Installation Guide
2-4
Installing or removing a chassis
Working near power supplies
Use caution; do not become a victim yourself.
Turn off power to the system.
If possible, send another person to get medical aid. Otherwise, assess the condition of the victim
and then call for help.
Determine if the person needs rescue breathing or external cardiac compressions; then take
appropriate action.
Chapter 2
Preparing for Installation
OL-5916-01
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Troubleshooting
