•
Carefully examine your work area for possible hazards, such as moist floors, ungrounded power extension
cables, and missing safety grounds.
•
Never assume that power is disconnected from a circuit; always check.
•
Never perform any action that creates a potential hazard to people or makes the equipment unsafe.
•
If an electrical accident occurs, proceed as follows:
◦
Use caution, and do not become a victim yourself.
◦
Turn off power to the router.
◦
If possible, send another person to get medical aid. Otherwise, determine the condition of the
victim, and then call for help.
◦
Determine whether the person needs rescue breathing or external cardiac compressions; then take
appropriate action.
In addition, use the following guidelines when working with any equipment that is disconnected from a power
source, but still connected to telephone wiring or network cabling:
•
Never install telephone wiring during a lightning storm.
•
Never install telephone jacks in wet locations unless the jack is specifically designed for it.
•
Never touch uninsulated telephone wires or terminals unless the telephone line is disconnected at the
network interface.
•
When installing or modifying telephone lines, use caution.
Power Supply Considerations
Check the power at your site to ensure that you are receiving clean power (free of spikes and noise). Install a
power conditioner, if necessary.
This equipment has been designed for connection to TN and IT power systems. Statement 1007
Warning
Preventing ESD Damage
This equipment needs to be grounded. Use a green and yellow 6 AWG ground wire to connect the host
to earth ground during normal use. Statement 383
Warning
Electrostatic discharge (ESD) can damage equipment and impair electrical circuitry. ESD may occur when
electronic printed circuit cards are improperly handled and can cause complete or intermittent failures. When
removing and replacing modules, always follow ESD prevention procedures:
•
Ensure that the router chassis is electrically connected to earth ground.
Cisco ASR 902 and ASR 902U Aggregation Services Router Hardware Installation Guide
47
Preparing for Installation
Power Supply Considerations
