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Safety Warnings
Warning
This unit might have more than one power supply connection. All connections must be removed to de-energize
the unit. Statement 1028
Warning
To prevent personal injury or damage to the chassis, never attempt to lift or tilt the chassis using the handles
on modules (such as power supplies, fans, or cards); these types of handles are not designed to support the
weight of the unit. Statement 1032
Warning
Connect the unit only to DC power source that complies with the safety extra-low voltage (SELV) requirements
in IEC 60950 based safety standards. Statement 1033
Warning
When installing or replacing the unit, the ground connection must always be made first and disconnected last.
Statement 1046
Warning
This equipment must be grounded. Never defeat the ground conductor or operate the equipment in the absence
of a suitably installed ground conductor. Contact the appropriate electrical inspection authority or an electrician
if you are uncertain that suitable grounding is available. Statement 1024
Warning
Installation of the equipment must comply with local and national electrical codes. Statement 1074
Warning
Hazardous voltage or energy may be present on power terminals. Always replace cover when terminals are
not in service. Be sure uninsulated conductors are not accessible when cover is in place. Statement 1086
When working on equipment that is powered by electricity, follow these guidelines:
• Locate the room's emergency power-off switch. If an electrical accident occurs, you know where to
quickly turn off the power.
• Before starting work on the system, turn off the DC main circuit breaker and disconnect the power
terminal block cable.
• Disconnect all power when:
• Never install equipment that appears damaged.
• Working on or near power supplies
• Installing or removing a device chassis or network processor module
• Performing most hardware upgrades
Cisco ASR-920-20SZ-M Aggregation Services Router Hardware Installation Guide
Safety with Electricity
5
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