Juniper MX2020 Hardware Manual page 655

c. Insert the wire labeled L2 into the input terminal labeled B2.
d. Insert the wire labeled L3 into the input terminal labeled C2.
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.
WARNING:
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: Three-phase delta AC wire assembly kits can be purchased from Juniper Networks.
Table 103: 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:
only.
11. Verify that the power cord wire connections are correct.
To protect power supplies from input voltage that may be caused
Description
4 conductor wires, each wire is 6-AWG
Power connections must be performed by a licensed electrician
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