Juniper QFabric QFX3008-I, Manual, Page: 81 / 472

CAUTION: Mixing different types of wiring trays in the same chassis is not a
supported configuration.
The single-phase wiring tray has three appliance inlets. See “AC Power Specifications
for a QFX3008-I Interconnect Device with Single-Phase Wiring Trays” on page 137 .
NOTE: To provide power feed redundancy, all three appliance inlets on the
single-phase wiring tray in slot Wiring Tray 0 must be powered by dedicated
power feeds derived from feed A, and all appliance inlets on the wiring tray
in slot
Wiring Tray 1 must be powered by dedicated power feeds derived from
feed B. This configuration provides the commonly deployed A/B feed
redundancy for the system.
The three-phase wiring trays have a terminal block specific to either standard delta or
standard wye wiring configurations. The power cords that you provide for the three-phase
wiring trays must be installed before you install the wiring trays. See
“AC Power
Specifications for a QFX3008-I Interconnect Device with Three-Phase Delta Wiring Trays”
on page 138
and “AC Power Specifications for a QFX3008-I Interconnect Device with
Three-Phase Wye Wiring Trays” on page 138 .
NOTE: To provide power feed redundancy, the three-phase wiring tray in slot
Wiring Tray 0 must be powered by a dedicated power feed derived from feed A,
and the wiring tray in slot Wiring Tray 1 must be powered by a dedicated power
feed derived from feed B. This configuration provides the commonly deployed
A/B feed redundancy for the system.
You must install two wiring trays in a QFX3008-I Interconnect device. Wiring trays are
installed at the bottom of the chassis in slots labeled
Wiring Tray 0 and Wiring Tray 1 (left
to right). See “Slot Numbering for a QFX3008-I Interconnect Device” on page 40 .
NOTE: A QFX3008-I Interconnect device has two protective earthing
terminals provided on the rear of the chassis. 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). Only
one of the two protective earthing terminals needs to be permanently
connected to earth ground.
Three LEDs on the faceplate indicate the status of each power channel. Each wiring tray
also has a power switch on the faceplate. See
Figure 28 on page 56 and Figure 29 on
page 56 .
55 Copyright © 2012, Juniper Networks, Inc.
Chapter 3: QFX3008-I Overview