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Cisco ASR 903 Router Hardware Installation Guide
OL-25178-04
Chapter 2 Preparing for Installation
Safety Guidelines
Warning
When you connect or disconnect the power and relay connector with power applied, an electrical arc
can occur. This could cause an explosion in hazardous area installations. Be sure that power is
removed from the switch and alarm circuit. Be sure that power cannot be accidentally turned on or
verify that the area is nonhazardous before proceeding. Failure to securely tighten the power and
relay connector captive screws can result in an electrical arc if the connector is accidentally
removed.
Statement 1058
Warning
Take care when connecting units to the supply circuit so that wiring is not overloaded.
Statement 1018
Warning
The plug-socket combination must be accessible at all times, because it serves as the main
disconnecting device.
Statement 1019
Warning
To avoid electric shock, do not connect safety extra-low voltage (SELV) circuits to telephone-network
voltage (TNV) circuits. LAN ports contain SELV circuits, and WAN ports contain TNV circuits. Some
LAN and WAN ports both use RJ45 connectors. Use caution when connecting cables.
Statement 1021
Warning
A readily accessible two-poled disconnect device must be incorporated in the fixed wiring.
Statement
1022
Warning
To reduce the risk of fire, use only 26 AWG or larger telecommunication line cord.
Statement 1023
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
Use copper conductors only.
Statement 1025
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