Safety With Electricity - Cisco ASR 903 Hardware Installation Manual

Safety Guidelines
Invisible laser radiation may be emitted from disconnected fibers or connectors. Do not stare into
Warning
beams or view directly with optical instruments. Statement 1051

Safety with Electricity

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
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
Do not work on the system or connect or disconnect cables during periods of lightning activity.
Warning
Statement 1001
Before performing any of the following procedures, ensure that power is removed from the DC circuit.
Warning
Statement 1003
Read the installation instructions before connecting the system to the power source. Statement 1004
Warning
Warning This product relies on the building's installation for short-circuit (overcurrent) protection. Ensure that
the protective device is rated: For a -48/-60 VDC installation, the wire shall be 12 AWG minimum with
a 20 A branch circuit breaker. For a 24 VDC installation, the wire shall be 8 AWG minimum with a 40
A branch circuit breaker. Statement 1005
Warning This product relies on the building's installation for short-circuit (overcurrent) protection. For an AC
installation, ensure that the branch circuit breaker is rated a maximum 20A.
Warning There is the danger of explosion if the battery is replaced incorrectly. Replace the battery only with
the same or equivalent type recommended by the manufacturer. Dispose of used batteries according
to the manufacturer's instructions. Statement 1015
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
Cisco ASR 903 Router Hardware Installation Guide
2-4
Chapter 2 Preparing for Installation
OL-25178-04