Installing An Mx2020 Three-Phase Delta Ac Power Cord - Juniper MX2020 Hardware Manual

Installing an MX2020 Three-Phase Delta AC Power Cord

Copyright © 2015, Juniper Networks, Inc.
To install a three-phase delta AC power cord:
Switch off the customer site circuit breakers to the PDM being removed. Make sure
1.
that the voltage across the AC power source cord is 0 V and that there is no chance
that the cord might become active during the installation process.
Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect
2.
the strap to one of the ESD points on the chassis.
Switch the power switches on all the PSM faceplates to the off (
3.
PSMs that are powered only from this PDM.
NOTE: After powering off a PSM, wait at least 60 seconds before turning
it back on.
Using a number 2 Phillips (+) screwdriver, loosen the four screws on the cover of the
4.
metal wiring compartment that protects the AC terminal block.
Remove the cover of the metal AC wiring compartment.
5.
Unscrew the retaining nut from the AC power cord.
6.
Place the retaining nut inside the metal wiring compartment.
7.
Put the wires of the AC power cord through the hole of the retaining nut and rubber
8.
grommet.
Put the wires of the AC power cord through the hole of the metal wiring compartment.
9.
Connect the wires to the AC terminal block on the three-phase delta AC PDM (see
10.
Figure 240 on page 508). Loosen each of the input terminal or grounding point screws,
and insert the wire into the grounding point or input terminal, and tighten the screw
(see Table 97 on page 509
To insert wires into the terminal block that serves six 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
for approved AC wire gauge).
L1 into the input terminal labeled
into the input terminal labeled
L2
L3 into the input terminal labeled
Chapter 25: Replacing Components
O ) position for any
.
GND
A1 .
.
B1
C1 .
507