Safety With Electricity - Cisco 901 Installation Manual

Safety Guidelines
•

Safety with Electricity

Before performing any of the following procedures, ensure that power is removed from the DC circuit.
Warning
Statement 1003
This unit is intended for installation in restricted access areas. A restricted access area can be
Warning
accessed only through the use of a special tool, lock and key, or other means of security.
Statement 1017
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
Warning Before working on a chassis or working near power supplies, unplug the power cord on AC units;
disconnect the power at the circuit breaker on DC units. Statement 12
During periods of lightning activity, do not work on the system or connect or disconnect cables.
Warning
Statement 1001
There is the danger of explosion if the battery is replaced incorrectly. Replace the battery only with
Warning
the same or equivalent type recommended by the manufacturer. Dispose of used batteries according
to the manufacturer's instructions. Statement 1015
This unit might have more than one power supply connection. All connections must be removed to
Warning
de-energize the unit. Statement 1028
When working on electrical equipment, follow these guidelines:
•
•
•
Cisco ASR 901 Series Aggregation Services Router Hardware Installation Guide
2-2
When working under conditions hazardous to your eyes, wear safety glasses.
Locate the room's emergency power switch. If an electrical accident occurs, you can quickly switch
off the power.
Before working on the system, switch off the DC main circuit breaker and disconnect the power
terminal block cable.
Disconnect all power before performing the following:
Chapter 2 Preparing to Install the Router
OL-23778-01