Table 98: Supported Three-Phase Delta Ac Wire Gauge - Juniper MX2020 Hardware Manual

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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: 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: Three-phase delta AC wire assembly kits can be purchased from
Juniper Networks.

Table 98: 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.
Verify that the power cord wire connections are correct.
15.
Screw the retaining nut onto the AC power cord to secure it to the metal wiring
16.
compartment.
Using a number 2 Phillips (+) screwdriver, tighten the four captive screws on the metal
17.
AC wiring compartment.
Verify that the AC power cord is not touching or blocking access to router components,
18.
and that it does not drape where people could trip on it.
Remove the ESD grounding strap from the ESD points on the chassis. Connect the
19.
strap to an approved site ESD grounding point. See the instructions for your site.
Connect the AC power cord plug to the power source.
20.
Chapter 25: Replacing Components
Description
4 conductor wires, each wire is 6-AWG
517