Table 78: Supported Three-Phase Delta Ac Wire Gauge - Juniper MX2020 Hardware Manual

Copyright © 2015, Juniper Networks, Inc.
CAUTION: Wire label configuration is for Juniper Networks supplied cable
only. If using your own cable, make sure you use the proper connections.
To connect wires to the terminal block that serves three PSMs:
a. Insert the grounding wire into the grounding point labeled
b. Insert the wire labeled
c. Insert the wire labeled
d. Insert the wire labeled
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-B1, B1-C1, C1-A1, A2-B2, B2-C2, and C2-A2
for three-phase delta 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: The terminal connections have either slotted screws or hex screws.
Use a 1/4-in. slotted screwdriver for the slotted screws. Use a 5/32-in.
(4 mm) Allen wrench for the 5/16-in. hex screws.
NOTE: Three-phase delta AC wire assembly kits can be purchased from
Juniper Networks.

Table 78: Supported Three-Phase Delta AC Wire Gauge

Wire Gauge
4 x 6-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.
Chapter 19: Connecting the Router to Power
L1 into the input terminal labeled
into the input terminal labeled
L2
L3 into the input terminal labeled
Description
4 conductor wires, each wire is 6-AWG
.
GND
A2 .
.
B2
C2 .
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