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Maintain Safety with Electricity
Maintain Safety with Electricity
Warning
Follow these guidelines when working on equipment powered by electricity:
• Before beginning procedures that require access to the interior of the chassis, locate the emergency
• Do not work alone if potentially hazardous conditions exist anywhere in your work space.
• Never assume that power is disconnected; always check.
• Look carefully for possible hazards in your work area, such as moist floors, ungrounded power extension
• If an electrical accident occurs:
• Use the chassis within its marked electrical ratings and product usage instructions.
• The chassis is equipped with an AC-input power supply, which is shipped with a three-wire electrical
Prevent ESD Damage
ESD occurs when electronic components are improperly handled, and it can damage equipment and impair
electrical circuitry, which can result in intermittent or complete failure of your equipment.
Always follow ESD-prevention procedures when removing and replacing components. Ensure that the chassis
is electrically connected to an earth ground. Wear an ESD-preventive wrist strap, ensuring that it makes good
skin contact. Connect the grounding clip to an unpainted surface of the chassis frame to safely ground ESD
voltages. 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.
For safety, periodically check the resistance value of the antistatic strap, which should be between one and
10 megohms.
Cisco Secure Web Appliance S196, S396, S696, and S696F Hardware Installation Guide
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Before working on a chassis, be sure the power cord is unplugged.
power-off switch for the room in which you are working. Then, if an electrical accident occurs, you can
act quickly to turn off the power.
cables, frayed power cords, and missing safety grounds.
• Use caution; do not become a victim yourself.
• Disconnect power from the system.
• If possible, send another person to get medical aid. Otherwise, assess 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.
cord with a grounding-type plug that fits into a grounding-type power outlet only. Do not circumvent
this safety feature. Equipment grounding should comply with local and national electrical codes.
Installation Preparation
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