Catalyst 6500 Series Switches Installation Guide - Ipland
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Catalyst 6500 Series Switches Installation Guide - Ipland

Catalyst 6500 Series Switches Installation Guide - Ipland Catalyst 6500 Series Switches Installation Guide - Ipland

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Establishing the System Ground Chapter 3 Installing the Switch Establishing the System Ground This section describes how to connect a system ground to the Catalyst 6500 series switches. Note This system ground is also referred to as the network equipment building system (NEBS) ground. Caution Installations that rely solely on system grounding using only an AC third-prong ground run a substantially greater risk of equipment problems and data corruption than those installations that use both the AC third-prong ground and a properly installed system (NEBS compliant) ground. 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: • You must install the system (NEBS) ground connection with any other rack or system power ground connections that you make. The system (NEBS) ground connection is required if FXS modules are installed or 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 FXS modules are installed or if this equipment is installed in a U.S. or European Central Office. • For Catalyst 6503 or Catalyst 6503-E chassis that are equipped with DC-input power supplies, you must install the system (NEBS) ground before you attach the source DC power cables to the DC PEM. If the Catalyst 6503 or Catalyst 6503-E chassis is powered up, you must power down the chassis before attaching the system (NEBS) ground. If you are installing the system (NEBS) ground on other models of the Catalyst 6500 series chassis that are equipped with either AC-input or DC-input power supplies, you do not need to power down the chassis. • If you are installing the 8700 W AC-input power supply on a Catalyst 6506, Catalyst 6509, or on a Catalyst 6509-NEB chassis, you must install the system ground (NEBS ground) on the power supply rather than on the switch chassis. The extended depth of the 8700 W power supply blocks access to the system ground pad on those chassis. There are two ground posts located on the power supply faceplate where the system ground connection can be made. Note 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 6 AWG grounding wire. Note The system (NEBS) ground serves as the primary safety ground for the Catalyst 6503 and Catalyst 6503-E chassis that are equipped with DC-input power supplies. The DC-input power supplies for these chassis do not have a separate ground. 3-52 Catalyst 6500 Series Switches Installation Guide OL-5781-08

Chapter 3 Installing the Switch Establishing the System Ground 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 kit. • Grounding screws—Two M4 x 8 mm (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 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 switch to proper grounding facilities. • No. 1 Phillips screwdriver. • Crimping tool to crimp the grounding wire to the grounding lug. • Wire-stripping tool to remove the insulation from the grounding wire. Connecting the System Ground To attach the grounding lug and cable to the grounding pad, follow these steps: Step 1 Step 2 Step 3 Step 4 Use a wire-stripping tool to remove approximately 0.75 inch (19 mm) of the covering from the end of the grounding wire. Insert the stripped end of the grounding wire into the open end of the grounding lug. Crimp the grounding wire in the barrel of the grounding lug. Verify that the ground wire is securely attached to the ground lug. Locate and remove the adhesive label from the system grounding pad on the switch. The location of the system grounding pad differs among Catalyst 6500 series chassis. Refer to these figures to locate the system grounding pad on your chassis: • Catalyst 6503 and Catalyst 6503-E chassis—Figure 3-28 Caution The system (NEBS) ground serves as the primary safety ground for the Catalyst 6503 and Catalyst 6503-E chassis that are equipped with DC-input power supplies. You must install the system (NEBS) ground before you attach the source DC power cables to the DC PEM. If the Catalyst 6503 or Catalyst 6503-E chassis are already powered up, we recommend that you remove the source DC from the Catalyst 6503 and Catalyst 6503-E chassis before attaching the system (NEBS) ground. • Catalyst 6504-E chassis—Figure 3-29 • Catalyst 6506, Catalyst 6509, and Catalyst 6509-NEB chassis—Figure 3-30 • Catalyst 6506-E, Catalyst 6509-E, Catalyst 6513, and Catalyst 6513-E chassis—Figure 3-31 • Catalyst 6509-NEB-A and Catalyst 6509-V-E chassis—Figure 3-32 OL-5781-08 Catalyst 6500 Series Switches Installation Guide 3-53

Establishing the System Ground<br />

Chapter 3<br />

Installing the Switch<br />

Establishing the System Ground<br />

This section describes how to connect a system ground to the <strong>Catalyst</strong> <strong>6500</strong> series switches.<br />

Note<br />

This system ground is also referred to as the network equipment building system (NEBS) ground.<br />

Caution<br />

<strong>Installation</strong>s that rely solely on system grounding using only an AC third-prong ground run a<br />

substantially greater risk of equipment problems and data corruption than those installations that use<br />

both the AC third-prong ground and a properly installed system (NEBS compliant) ground.<br />

The system (NEBS) ground provides additional grounding for EMI shielding requirements and<br />

grounding for the low voltage supplies (DC-DC converters) on the modules and is intended to satisfy the<br />

Telcordia Technologies NEBS requirements for supplemental bonding and grounding connections. You<br />

must observe the following system grounding guidelines for your chassis:<br />

• You must install the system (NEBS) ground connection with any other rack or system power ground<br />

connections that you make. The system (NEBS) ground connection is required if FXS modules are<br />

installed or if this equipment is installed in a U.S. or European Central Office.<br />

• You must connect both the system (NEBS) ground connection and the power supply ground<br />

connection to an earth ground. The system (NEBS) ground connection is required if FXS modules<br />

are installed or if this equipment is installed in a U.S. or European Central Office.<br />

• For <strong>Catalyst</strong> 6503 or <strong>Catalyst</strong> 6503-E chassis that are equipped with DC-input power supplies, you<br />

must install the system (NEBS) ground before you attach the source DC power cables to the DC<br />

PEM. If the <strong>Catalyst</strong> 6503 or <strong>Catalyst</strong> 6503-E chassis is powered up, you must power down the<br />

chassis before attaching the system (NEBS) ground. If you are installing the system (NEBS) ground<br />

on other models of the <strong>Catalyst</strong> <strong>6500</strong> series chassis that are equipped with either AC-input or<br />

DC-input power supplies, you do not need to power down the chassis.<br />

• If you are installing the 8700 W AC-input power supply on a <strong>Catalyst</strong> 6506, <strong>Catalyst</strong> 6509, or on a<br />

<strong>Catalyst</strong> 6509-NEB chassis, you must install the system ground (NEBS ground) on the power supply<br />

rather than on the switch chassis. The extended depth of the 8700 W power supply blocks access to<br />

the system ground pad on those chassis. There are two ground posts located on the power supply<br />

faceplate where the system ground connection can be made.<br />

Note<br />

In all situations, grounding practices must comply with Section 250 of the National Electric Code (NEC)<br />

requirements or local laws and regulations. A 6 AWG grounding wire is preferred from the chassis to the<br />

rack ground or directly to the common bonding network (CBN). The equipment rack should also be<br />

connected to the CBN with 6 AWG grounding wire.<br />

Note<br />

The system (NEBS) ground serves as the primary safety ground for the <strong>Catalyst</strong> 6503 and<br />

<strong>Catalyst</strong> 6503-E chassis that are equipped with DC-input power supplies. The DC-input power supplies<br />

for these chassis do not have a separate ground.<br />

3-52<br />

<strong>Catalyst</strong> <strong>6500</strong> <strong>Series</strong> <strong>Switches</strong> <strong>Installation</strong> <strong>Guide</strong><br />

OL-5781-08

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