Safety with Electricity
Before working on a chassis or with power supplies, unplug the power cord on AC units. Disconnect the
power at the circuit breaker on DC units. Statement 12
Warning
Before working on equipment that is connected to power lines, remove jewelry (including rings, necklaces,
and watches). Metal objects heat up when connected to power and ground and can cause serious burns or
weld the metal object to the terminals. Statement 43
Warning
Read the installation instructions before connecting the system to the power source. Statement 1004
Warning
The plug-socket combination must be accessible always, because it serves as the main disconnecting device.
Statement 1019
Warning
This unit may have more than one power supply connection. All connections must be removed to de-energize
the unit. Statement 1028
Warning
When installing or replacing the unit, ensure the ground connection first and disconnected last. Statement
1046
Warning
This equipment is intended to be grounded to comply with emission and immunity requirements. Ensure that
the switch functional ground lug is connected to earth ground during normal use. Statement 1064
Warning
Installation of the equipment must comply with local and national electrical codes. Statement 1074
Warning
When working on equipment that is powered by electricity, follow these guidelines:
Cisco Network Convergence System 540 Large Density Routers Hardware Installation Guide
3
Safety Warnings
Safety with Electricity
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