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
Grounding lugs must be installed on the location marked on the chassis only.
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.
Note
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.
• When the power is switched off, put a lock-box on the circuit, so that no one can accidentally switch it
on.
• Look carefully for possible hazards in your work area, such as damp floors, ungrounded power extension
cables, frayed or damaged power cords, and missing safety grounds.
• If an electrical accident occurs, proceed as follows:
• Use extreme caution; do not become a victim yourself.
• Disconnect power from the system.
• Seek medical attention, if necessary.
• 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:
• 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.
• The product does not operate correctly when you follow the operating instructions.
Cisco Catalyst 9300 Series Switches Hardware Installation Guide
42
Preparing for Installation
Maintaining Safety with Electricity
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