First Published: January 31, 2017

Last Updated: May 16, 2018

Electrostatic Discharge and Grounding Guide for Cisco NCS 2000 Series

This document uses illustrations to explain the workflow that we recommend for grounding the Cisco NCS 2000 Series chassis. It also explains best practices to be followed to prevent electrostatic discharge (ESD) damage, which can occur when the equipment is improperly handled.

The following sections are included in this document:

Prerequisites

Before locating and grounding any chassis, you must complete the following prerequisites:

Moving the Shelf

Perform the following steps before moving the shelf to the new site.


Note

It is recommended to back up the database before moving the shelf.

  • Remove the standby control card from the node.

  • Switch off the power to the shelf.

  • Remove the active control card from the node.

  • Move the node to the desired location.

  • Insert the standby control card first in the active slot to boot up the shelf.

  • When the shelf is booted up and traffic is running, the Protection Unit Not Available (PROTNA) alarm is raised.

  • Insert the previously active control card in the standby slot to clear the PROTNA alarm.

Preparing Your Location

This section illustrates how the building that houses the chassis must be properly grounded to the earth ground. (See the figure below.)


Warning

This product requires short-circuit (overcurrent) protection to be provided as part of the building installation. Install only in accordance with national and local wiring regulations. Statement 1045.


Warning

A readily accessible two-poled disconnect device must be incorporated in the fixed wiring. Statement 1022.

Figure 1. Building with Rack Room Connected to Earth Ground

Preparing the Rack Room

This section explains how the rack enclosures must be properly connected to the building earth ground. It also illustrates how to keep the chassis in a sealed anti-static bag until you are ready to install it. (See the figure below.)


Warning

Before performing any of the following procedures, ensure that power is removed from the DC circuit. Statement 1003.

Figure 2. Rack Room Connected to Earth Ground

Preparing Yourself

This section illustrates how to prepare yourself before removing the chassis from the sealed anti-static bag. The figure below illustrates how to cuff the ESD strap around the wrist and the ground cord that connects the cuff to the ground. ESD wrist straps are the primary means of controlling static charge on personnel.

Figure 3. Wearing the ESD Strap

The figure below illustrates how you must be properly grounded before handling the chassis.

Figure 4. Handling the Chassis

Locating and Grounding the Chassis

This section explains how to locate and ground the following Cisco NCS chassis:


Warning

This equipment is intended to be grounded. Ensure that the host is connected to earth ground during normal use. Statement 39.


Warning

Use copper conductors only. Statement 1025.


Warning

When installing or replacing the unit, the ground connection must always be made first and disconnected last. Statement 1046.


Note
A #6 AWG cable or a 1 inch wide flat copper braid (with minimum total strands count of 1050 x 36 AWG or 260 x 36 AWG) is mandatory to install the Cisco NCS 2000 Series chassis.

Locating and Grounding the Cisco NCS 2002 Chassis

Before locating and grounding the Cisco NCS 2002 chassis, you must complete the prerequisites mentioned in Prerequisites. To locate the ground point and attach a ground cable to the Cisco NCS 2002 chassis:

SUMMARY STEPS

  1. Verify that the office ground cable is connected to the top of the bay and the office ground, according to local site practice.
  2. Remove any paint and other non-conductive coatings from the surfaces between the chassis ground and bay frame ground point. Clean the mating surfaces and apply appropriate antioxidant compound to the bare conductors.
  3. Attach one end of the shelf ground cable (#6 AWG cable or 1 inch copper braid) to the ground point on the chassis using the specified dual-hole lug connector. (See diagrams 1 and 2 in the figure below.)
  4. Attach the other end of the shelf ground cable to the bay frame using a dual-hole lug connector according to the equipment bay frame specifications. (See diagram 3 in the figure below.)

DETAILED STEPS

Step 1

Verify that the office ground cable is connected to the top of the bay and the office ground, according to local site practice.

Note 
Additional ground cables may be added depending on local site practice. The Cisco NCS 2002 chassis is designated only for a Common Bonding Network (CBN), according to the GR-1089-CORE Issue 4 (sec 9.3) definitions.
Note 
The DC power battery return (BR) terminal or positive terminal must be grounded at the source end (power feed or DC mains power end). The DC power BR input terminal is not connected to the equipment frame (chassis), so it is configured as DC-I according to the GR-1089-CORE, Issue 4 (sec 9.8.3) definitions.
Step 2

Remove any paint and other non-conductive coatings from the surfaces between the chassis ground and bay frame ground point. Clean the mating surfaces and apply appropriate antioxidant compound to the bare conductors.

Step 3

Attach one end of the shelf ground cable (#6 AWG cable or 1 inch copper braid) to the ground point on the chassis using the specified dual-hole lug connector. (See diagrams 1 and 2 in the figure below.)

Step 4

Attach the other end of the shelf ground cable to the bay frame using a dual-hole lug connector according to the equipment bay frame specifications. (See diagram 3 in the figure below.)

Figure 5. Grounding NCS 2002 Chassis

Stop. You have completed this procedure.

Locating and Grounding the Cisco NCS 2006 Chassis

Before locating and grounding the Cisco NCS 2006 chassis, you must complete the prerequisites mentioned in Prerequisites. To locate the ground point and attach a ground cable to the Cisco NCS 2006 chassis:

SUMMARY STEPS

  1. Verify that the office ground cable is connected to the top of the bay and the office ground, according to local site practice.
  2. Remove any paint and other non-conductive coatings from the surfaces between the chassis ground and bay frame ground point. Clean the mating surfaces and apply appropriate antioxidant compound to the bare conductors.
  3. Attach one end of the shelf ground cable to the ground point on the chassis using the specified dual-hole lug connector. (See diagrams 1 and 2 in the figure below.)
  4. Attach the other end of the shelf ground cable to the bay frame using a dual-hole lug connector according to equipment bay frame specifications. (See diagram 3 in the figure below.)

DETAILED STEPS

Step 1

Verify that the office ground cable is connected to the top of the bay and the office ground, according to local site practice.

Note 
Additional ground cables may be added depending on local site practice. The Cisco NCS 2006 chassis is designated only for a Common Bonding Network (CBN), according to the GR-1089-CORE Issue 4 (sec 9.3) definitions.
Note 
The DC power battery return (BR) terminal or positive terminal must be grounded at the source end (power feed or DC mains power end). The DC power BR input terminal is not connected to the equipment frame (chassis), so it is configured as DC-I according to the GR-1089-CORE, Issue 4 (sec 9.8.3) definitions.
Step 2

Remove any paint and other non-conductive coatings from the surfaces between the chassis ground and bay frame ground point. Clean the mating surfaces and apply appropriate antioxidant compound to the bare conductors.

Step 3

Attach one end of the shelf ground cable to the ground point on the chassis using the specified dual-hole lug connector. (See diagrams 1 and 2 in the figure below.)

Step 4

Attach the other end of the shelf ground cable to the bay frame using a dual-hole lug connector according to equipment bay frame specifications. (See diagram 3 in the figure below.)

Figure 6. Grounding NCS 2006 Chassis

Stop. You have completed this procedure.

Locating and Grounding the Cisco NCS 2015 Chassis

Before locating and grounding the Cisco NCS 2015 chassis, you must complete the prerequisites mentioned in Prerequisites. To locate the ground point and attach a ground cable to the Cisco NCS 2015 chassis:

SUMMARY STEPS

  1. Verify that the office ground cable is connected to the top of the bay and the office ground, according to local site practice.
  2. Remove any paint and other non-conductive coatings from the surfaces between the chassis ground and bay frame ground point. Clean the mating surfaces and apply appropriate antioxidant compound to the bare conductors.
  3. Attach one end of the shelf ground cable to the ground point on the chassis using the specified dual-hole lug connector. (See diagrams 1 and 2 in the figure below.)
  4. Attach the other end of the shelf ground cable to the bay frame using a dual-hole lug connector according to equipment bay frame specifications. (See diagram 3 in the figure below.)

DETAILED STEPS

Step 1

Verify that the office ground cable is connected to the top of the bay and the office ground, according to local site practice.

Note 
Additional ground cables may be added depending on local site practice. The Cisco NCS 2015 chassis is designated only for a Common Bonding Network (CBN), according to the GR-1089-CORE Issue 4 (sec 9.3) definitions.
Note 
The DC power battery return (BR) terminal or positive terminal must be grounded at the source end (power feed or DC mains power end). The DC power BR input terminal is not connected to the equipment frame (chassis), so it is configured as DC-I according to the GR-1089-CORE, Issue 4 (sec 9.8.3) definitions.
Step 2

Remove any paint and other non-conductive coatings from the surfaces between the chassis ground and bay frame ground point. Clean the mating surfaces and apply appropriate antioxidant compound to the bare conductors.

Step 3

Attach one end of the shelf ground cable to the ground point on the chassis using the specified dual-hole lug connector. (See diagrams 1 and 2 in the figure below.)

Step 4

Attach the other end of the shelf ground cable to the bay frame using a dual-hole lug connector according to equipment bay frame specifications. (See diagram 3 in the figure below.)

Figure 7. Grounding NCS 2015 Chassis

Stop. You have completed this procedure.

Installing the Line Cards

This section describes how to properly install the line cards. The following topics are included in this section:

Preparing the Work Surface for Installing Line Cards

This section illustrates how you and the work surface that you are placing the line card on must be properly grounded. As shown in the figure below, ensure that you follow these steps:

  • Ground yourself by wearing an ESD wrist band that is connected to the earth ground.
  • Ground the table to the earth ground.
  • Ground the chassis to the earth ground.
  • Ground the rack to the earth ground.
Figure 8. Work Surface for Installing the Line Cards

Transporting Line Cards

This section illustrates how the line card must be kept in a sealed antistatic bag while being transported. (see the figure below)

Figure 9. Transporting Line Cards

Handling Line Cards

This section illustrates how you must be properly grounded before removing the line card from the antistatic bag. It also illustrates how you must handle the line card by the front panel and the metal carrier only. (see the figure below)

Figure 10. Handling Line Cards

Removing and Installing Line Cards

This section illustrates the precautions to be taken while removing and installing the line cards. (see the figure below)

Figure 11. Removing and Installing Line Cards

Any Internet Protocol (IP) addresses used in this document are not intended to be actual addresses. Any examples, command display output, and figures included in the document are shown for illustrative purposes only. Any use of actual IP addresses in illustrative content is unintentional and coincidental.

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