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Chapter 2 Preparing for Installation
Safety with Electricity
2-8
Cisco 12006 and Cisco 12406 Router Installation and Configuration Guide
OL-11497-03
Caution Periodically check the resistance value of the antistatic wrist strap. The resistance
measurement should be between 1 and 10 megohms.
Safety with Electricity
The line cards, redundant clock and scheduler cards, switch fabric cards, alarm
cards, blower module, and redundant power modules can be removed and replaced
while the router is operating without presenting an electrical hazard or causing
damage to the router.
Follow these basic guidelines when working with any electrical equipment:
• Before beginning any procedures requiring access to the interior of the router,
locate the emergency power-off switch for the room in which you are
working.
• Disconnect all external cables before installing or removing a router.
• Never assume that power has been disconnected from a circuit; always check.
• Do not perform any action that creates a potential hazard to people or makes
the equipment unsafe.
• Never install equipment that appears damaged.
• Carefully examine your work area for possible hazards such as moist floors,
ungrounded power extension cables, and missing safety grounds.
• If an electrical accident does occur, proceed as follows:
–
Use caution; do not become a victim yourself. Disconnect power to the
router.
–
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.
In addition, observe the following guidelines when working with any equipment
that is disconnected from a power source but still connected to telephone or
network wiring:
• Never install telephone wiring during a lightning storm.