Table 79: Supported Three-Phase Wye Ac Wire Gauge - Juniper MX2020 Hardware Manual

Related
Documentation
Copyright © 2015, Juniper Networks, Inc.
WARNING: To protect power supplies from input voltage that may be
caused by miswired PDMs, before reinstalling the metal cover to the wiring
compartment apply AC voltage to the PDM (with disengaged PSM) to
make sure that two LEDs on the PDM are lit green and that the AC voltage
between AC terminal blocks A1-N1, B1-N1, C1-N1, A2-N2, B2-N2, and C2-N2
for three-phase wye PDM is not more than 264VAC when measured with
a DVM. Then turn off the AC breaker de-energizing the PDM and install
the metal cover and engage all AC PSMs.
NOTE: Three-phase wye AC wire assembly kits can be purchased from
Juniper Networks.

Table 79: Supported Three-Phase Wye AC Wire Gauge

Wire Gauge
5 x 10-AWG or equivalent
NOTE: We recommend that you use the proper gauge wire in order for the
cable clamps to hold the AC cables. Using smaller gauge wiring will result
in the cable clamps not tightening properly.
WARNING: Power connections must be performed by a licensed electrician
only.
Verify that the power cable connections are correct.
12.
Screw the retaining nut onto the AC power cord to secure it to the metal wiring
13.
compartment.
Reinstall the metal PDM wiring cover, and using a number 2 Phillips (+) screwdriver,
14.
tighten the four captive screws on the metal AC wiring compartment. Apply between
10 lb-in. (1.13 Nm) to 12 lb-in. (1.35 Nm) of torque to each screw. Do not overtighten
the screws.
Use the provided plastic cable tie to fasten the AC power cord to the PDM.
15.
Verify that the AC power cord is not touching or blocking access to router components,
16.
and that it does not drape where people could trip on it.
Repeat the procedure for the other three-phase wye AC PDMs.
17.
MX2020 Three-Phase Wye AC Power Distribution Module Description on page 88
MX2020 Three-Phase Delta and Wye AC Power Distribution Module LEDs on page 91
Chapter 19: Connecting the Router to Power
Description
5 conductor wires, each wire is 10-AWG
255