Preventing Electrostatic Discharge Damage - Cisco Line Card 4500 E-Series Installation Manual

Chapter 2 Preparing for Installation
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Preventing Electrostatic Discharge Damage

Electrostatic discharge (ESD) damage, which can occur when modules or other FRUs are improperly
handled, results in intermittent or complete failures. Modules consist of printed circuit boards that are
fixed in metal carriers. Electromagnetic interference (EMI) shielding and connectors are integral
components of the carrier. Although the metal carrier helps to protect the board from ESD, always use
an ESD grounding strap when handling modules.
To prevent ESD damage, follow these guidelines:
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Note
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Use approved power cables only. You have been provided with one or more power cables with your
chassis power supply that are intended for use in your country, based on the shipping location.
Should you need to purchase additional power cables, ensure that they are rated for the product and
for the voltage and current marked on the product's electrical ratings label. The voltage and current
rating of the power cable should be greater than the ratings marked on the label.
To help prevent electrical shock, plug all power cables into properly grounded electrical outlets.
These power cables are equipped with three-prong plugs to help ensure proper grounding. Do not
use adapter plugs or remove the grounding prong from a power cable.
Observe power strip ratings. Make sure that the total current rating of all products that are plugged
into the power strip does not exceed 80 percent of the power strip rating.
Do not modify power cables or plugs yourself. Consult with a licensed electrician or your power
company for site modifications. Always follow your local and national wiring codes.
Always use an ESD wrist strap and ensure that it makes maximum contact with bare skin. ESD
grounding straps are available with banana plugs, metal spring clips, or alligator clips. All
Catalyst 4500 E-series chassis are equipped with a bare metal hole banana plug connector
(identified by the ground symbol next to the connector) somewhere on the front panel. We
recommend that you use a personal ESD grounding strap equipped with a banana plug.
If you choose to use the disposable ESD wrist strap supplied with most FRUs or an ESD wrist strap
equipped with an alligator clip, you must attach the system ground lug to the chassis in order to
provide a proper grounding point for the ESD wrist strap.
This system ground is also referred to as the network equipment building system (NEBS)
ground.
If your chassis does not have the system ground attached, you must install the system ground. See
the "Establishing the System Ground Connection" section on page 3-7
and locations of the chassis system ground pads.
for installation instructions
Catalyst 4500 E-Series Switches Installation Guide
Site Requirements
2-11