Maintaining Safety With Electricity - Cisco Catalyst 6840 Series Hardware Installation Manual

Maintaining Safety with Electricity

Note In all situations, grounding practices must comply with Section 250 of the National Electric Code (NEC)
requirements or local laws and regulations. A 6 AWG grounding wire is preferred from the chassis to the rack
ground or directly to the common bonding network (CBN). The equipment rack should also be connected to
the CBN with a 6 AWG grounding wire.
Note Always ensure that all of the modules are completely installed and that the captive installation screws are
fully tightened. In addition, ensure that all the I/O cables and power cords are properly seated. These practices
are normal installation practices and must be followed in all installations.
Caution Category 5e, Category 6, and Category 6a cables can store large levels of static electricity because of the
dielectric properties of the materials used in their construction. Always ground the cables (especially in new
cable runs) to a suitable and safe earth ground before connecting them to the module.
Maintaining Safety with Electricity
When working on electrical equipment, follow these guidelines:
• Do not work alone if potentially hazardous conditions exist anywhere in your work space.
• Never assume that power is disconnected from a circuit; always check the circuit before working on it.
• Look carefully for possible hazards in your work area, such as damp floors, ungrounded power extension
• If an electrical accident occurs, proceed as follows:
• Use the product within its marked electrical ratings and product usage instructions.
• Install the product in compliance with local and national electrical codes.
• If any of the following conditions occur, contact the Cisco Technical Assistance Center:
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cables, frayed or damaged power cords, and missing safety grounds.
• Use extreme 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 if the person needs rescue breathing or external cardiac compressions; then take appropriate
action.
• The power cable or plug is damaged.
• An object has fallen into the product.
• The product has been exposed to water or other liquids.
• The product has been dropped or shows signs of damage.
Preparing for Installation