Preventing Electrostatic Discharge Damage - Cisco 2500 Series Installation And Configuration Manual

Preparing to Install the Router
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. (To see translated versions of
this warning, refer to the
accompanied the router.)
Warning Do not touch the power supply when the power cord is connected. For systems with a
power switch, line voltages are present within the power supply even when the power switch is
OFF and the power cord is connected. For systems without a power switch, line voltages are
present within the power supply when the power cord is connected. (To see translated versions of
this warning, refer to the
accompanied the router.)
Do not work alone if potentially hazardous conditions exist.
Never assume that power is disconnected from a circuit. Always check.
Warning Read the installation instructions before you connect the system to its power source. (To
see translated versions of this warning, refer to the
Information document that accompanied the router.)
Look carefully for possible hazards in your work area, such as moist floors, ungrounded power
extension cables, frayed power cords, and missing safety grounds.
If an electrical accident occurs, proceed as follows:
Use caution; do not become a victim yourself.
Turn OFF power to the system.
If possible, send another person to get medical aid. Otherwise, assess the condition of the
victim and then call for help.
Determine if the person needs rescue breathing or external cardiac compressions; then take
appropriate action.

Preventing Electrostatic Discharge Damage

Electrostatic discharge (ESD) can damage equipment and impair electrical circuitry. It occurs when
electronic components are improperly handled and can result in complete or intermittent failures.
Always follow ESD-prevention procedures when removing and replacing components. Ensure that the
chassis is electrically connected to earth ground. Wear an ESD-preventive wrist strap, ensuring that it
makes good skin contact. Connect the clip to an unpainted surface of the chassis frame to safely channel
unwanted ESD voltages to ground. To properly guard against ESD damage and shocks, the wrist strap
and cord must operate effectively. If no wrist strap is available, ground yourself by touching the metal
part of the chassis.
Caution For safety, periodically check the resistance value of the antistatic strap, which should
be between 1 to 10 megohms (Mohms).
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