Establishing The System Ground; Required Tools And Equipment - Cisco 5000 Series Hardware Installation Manual

Chapter 3 Installing the Cisco Nexus 5500 Platform or 5000 Series Switch
In addition, follow these guidelines when handling modules:
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For safety, periodically check the resistance value of the antistatic strap. The measurement should be
Caution
between 1 and 10 megohm (Mohm).

Establishing the System Ground

This section describes how to connect a system ground to the Cisco Nexus 5548P switch or or the Cisco
Nexus 5000 Series switch.
This system ground is also referred to as the network equipment building system (NEBS) ground.
Note
You must use the system (NEBS) ground on AC-powered systems if you are installing this equipment in
a U.S. or European Central Office.
The system (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:
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Required Tools and Equipment

To connect the system ground, you need the following tools and materials:
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OL-15902-01
S e n d c o m m e n t s t o n 5 k d o c s @ c i s c o . c o m
Handle carriers by available handles or edges only; avoid touching the printed circuit boards or
connectors.
Place a removed component board-side-up on an antistatic surface or in a static-shielding container.
If you plan to return the component to the factory, immediately place it in a static-shielding
container.
Never attempt to remove the printed circuit board from the metal carrier.
You must install the system (NEBS) ground connection with any other rack or system power ground
connections that you make. The system ground connection is required if this equipment is installed
in a U.S. or European Central Office.
You must connect both the system (NEBS) ground connection and the power supply ground
connection to an earth ground. The system (NEBS) ground connection is required if this equipment
is installed in a U.S. or European Central Office.
You do not need to power down the chassis because the Cisco Nexus 5548 switch and the Cisco
Nexus 5020 switch are equipped with AC-input power supplies.
Grounding lug—A two-hole standard barrel lug. This lug supports up to 6 AWG wire. Supplied as
part of accessory kit.
Grounding screws—Two M4 x 8mm (metric) pan-head screws. These screws are supplied as part of
the accessory kit.
Cisco Nexus 5000 Series Hardware Installation Guide
Grounding the System
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