Cisco UCS 6332 Hardware Installation Manual page 32

Establishing the System Ground
• Place a removed component board-side-up on an antistatic surface or in a static-shielding container. If
• Never attempt to remove the printed circuit board from the metal carrier.
Establishing the System Ground
Note
This system ground is referred to as the network equipment building system (NEBS) ground.
You must use the NEBS ground on AC-powered systems if you are installing this equipment in a U.S. or
European Central Office.
The NEBS ground provides additional grounding for EMI shielding requirements and grounding for the
low-voltage supplies (DC-DC converters) on the modules, and is intended to satisfy the Telcordia Technologies
NEBS requirements for supplemental bonding and grounding connections. You must observe the following
system grounding guidelines for your chassis:
• You must install the NEBS ground connection with any other rack or system power ground connections
• You must connect both the NEBS ground connection and the power supply ground connection to an
• You do not need to power down the chassis because this device is equipped with AC-input power supplies.
Required Tools and Equipment
To connect the system ground, you need the following tools and materials:
• Grounding lug—A two-hole standard barrel lug. Supports up to 6 AWG wire. Supplied as part of accessory
• Grounding screws—Two M4 x 8mm (metric) pan-head screws. Supplied as part of the accessory kit.
• Grounding wire—Not supplied as part of accessory kit. The grounding wire should be sized according
• No. 1 Phillips head screwdriver.
• Crimping tool to crimp the grounding wire to the grounding lug.
Cisco UCS 6300 Series Fabric Interconnect Hardware Installation Guide
30
you plan to return the component to the factory, immediately place it in a static-shielding container.
Caution
For safety, periodically check the resistance value of the antistatic strap. The
measurement should be between 1 and 10 megohm (Mohm).
that you make. The system ground connection is required if this equipment is installed in a U.S. or
European Central Office.
earth ground. The NEBS ground connection is required if this equipment is installed in a U.S. or European
Central Office.
kit.
to local and national installation requirements. Depending on the power supply and system, a 12 AWG
to 6 AWG copper conductor is required for U.S. installations. Commercially available 6 AWG wire is
recommended. The length of the grounding wire depends on the proximity of the chassis to proper
grounding facilities.
Installing the Cisco UCS 6300 Series Fabric Interconnect