Juniper QFX3000-G QFabric, Руководство по развертыванию, Страница: 201 / 652

The accessory box shipped with the device includes a cable lug and two UNC ¼-20
screws with integrated washers. For power cord and grounding cable specifications, see
“AC Power Cord Specifications for a QFX3008-I Interconnect Device with Single-Phase
Wiring Trays” on page 133
, “AC Power Cord Specifications for a QFX3008-I Interconnect
Device with Three-Phase Delta Wiring Trays” on page 135 , “AC Power Cord Specifications
for a QFX3008-I Interconnect Device with Three-Phase Wye Wiring Trays” on page 136 ,
and Grounding Cable and Lug Specifications for a QFX3008-I Interconnect Device .
Before you begin to connect the QFX3008-I Interconnect device to earth ground:
•
Ensure that you understand how to prevent ESD damage. See Prevention of Electrostatic
Discharge Damage .
• Ensure that a licensed electrician has attached the grounding lug to an appropriate
grounding cable (see
Grounding Cable and Lug Specifications for a QFX3008-I
Interconnect Device ).
CAUTION: Using a grounding cable with an incorrectly attached lug can
damage the device.
Ensure you have the following tools and parts available to connect a QFX3008-I
Interconnect device to earth ground:
•
Electrostatic discharge (ESD) grounding strap
• Grounding cable (not provided) with attached lug
• Screws and split washers to secure the grounding lug to the protective earthing terminal
(two UNC ¼-20 screws with integrated washers are provided)
•
Phillips (+) torque screwdriver, number 2
CAUTION: You must use an appropriate torque-controlled tool to tighten
the screws on the grounding lug. Applying excessive torque damages the
grounding lug or chassis. Ground lugs should be installed with SAE Grade 5
screws or better at no more than 72 in-lb (8 Nm).
To connect a QFX3008-I Interconnect device to earth ground (see Figure 28 on page 176 ):
1.
Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect
the strap to the approved ESD site grounding point.
2.
Connect one end of the grounding cable to a proper earth ground, such as the rack in
which the device is installed.
3.
Detach the ESD grounding strap from the site ESD grounding point.
4.
Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect
the strap to the ESD point on the chassis.
175 Copyright © 2015, Juniper Networks, Inc.
Chapter 10: Installing a QFX3008-I Interconnect Device