Grounding Cable and Lug Specifications for a QFX3008-I Interconnect Device
The QFX3008-I Interconnect device must be adequately grounded before power is
connected to ensure proper operation and to meet safety and electromagnetic
interference (EMI) requirements. To ground a QFX3008-I Interconnect device, connect
a grounding cable to earth ground and then attach it to the chassis grounding points.
WARNING: The device is pluggable type A equipment installed in a
restricted-access location. It has a separate protective earthing terminal
provided on the chassis in addition to the grounding pin of the power supply
cord. This separate protective earthing terminal must be permanently
connected to earth ground for installations that require a separate grounding
conductor to the chassis.
CAUTION: Before device installation begins, a licensed electrician must
attach a cable lug to the grounding cables that you supply. A cable with an
incorrectly attached lug can damage the device.
Before connecting the device to earth ground, review the following information:
•
Two pairs of threaded inserts (PEM nuts) are provided on the QFX3008-I Interconnect
device for connecting the device to earth ground. The first pair is sized for M6 screws
and is located below the wiring tray on the bottom left corner at the rear of the chassis.
The second pair is sized for UNC ¼-20 screws and is located below the second wiring
tray on the bottom right corner at the rear of the chassis. The grounding points are
spaced at 0.625 in. (15.86 mm). UNC ¼-20 screws with washers are provided in the
accessory kit.
•
The grounding lug required is a Panduit LCD2-14A-Q or equivalent. This grounding lug
is provided in the accessory kit.
•
The grounding cable that you provide for a QFX3008-I Interconnect device must be 2
AWG (33.6 mm
2
), minimum 60° C wire, or as permitted by the local code.
NOTE: Only one of the two protective earthing terminals needs to be
permanently connected to earth ground.
Related
Documentation
• Connecting Earth Ground to a QFX3008-I Interconnect Device on page 237
• Connecting AC Power to a QFX3008-I Interconnect Device with Single-Phase Wiring
Trays on page 239
• Connecting AC Power to a QFX3008-I Interconnect Device with Three-Phase Delta
Wiring Trays on page 246
57Copyright © 2012, Juniper Networks, Inc.
Chapter 3: QFX3008-I Overview
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