Safety With Electricity - Cisco ASR 901S Series Preparing To Install

Safety with Electricity

• Before and after installation, keep the chassis area clean and dust-free.
• Keep tools and assembly components away from walk areas to avoid tripping over them.
• Do not work alone in potentially hazardous conditions.
• Do not perform any action that creates a potential hazard to people or makes the equipment unsafe.
• Do not wear loose clothing that may get caught in the chassis.
• When working under conditions hazardous to your eyes, wear safety glasses.
Safety with Electricity
Before performing any of the following procedures, ensure that power is removed from the DC circuit.
Warning
Statement 1003
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
Warning Before working on equipment that is connected to power lines, remove jewelry (including rings, 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
Before working on a chassis or working near power supplies, unplug the power cord on AC units; disconnect
Warning
the power at the circuit breaker on DC units. Statement 12
When working on electrical equipment, follow these guidelines:
• Locate the emergency power switch. If an electrical accident occurs, you can quickly switch off the
• Before working on the system, switch off the DC main circuit breaker and disconnect the power terminal
• Disconnect all power before performing the following :
• Never install equipment that appears damaged.
• Carefully examine your work area for possible hazards, such as wet floors, ungrounded power extension
Cisco ASR 901S Series Aggregation Services Router Hardware Installation Guide
2
power.
block cable.
◦ Working on or near power supplies.
◦ Installing or removing a router chassis or network processor module.
◦ Performing most hardware upgrades.
cables, and missing safety grounds.
Preparing to Install the Router
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