Connecting An Mx480 Dc Power Supply Cable - Juniper MX480 Hardware Manual

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Connecting an MX480 DC Power Supply Cable

Copyright © 2019, Juniper Networks, Inc.
Attach the power cord to the AC power source, and switch on the dedicated customer
5.
site circuit breaker for the power supply. Follow the ESD and connection instructions
for your site.
Switch the AC input switch on the each power supply to the on (
6.
observe the status LEDs on the power supply faceplate. If the power supply is correctly
installed and functioning normally, the
PS FAIL LED is not lit.
Replacing an MX480 AC Power Supply on page 318
AC Electrical Specifications for the MX480 Router on page 47
WARNING: Before performing DC power procedures, ensure that power is
removed from the DC circuit. To ensure that all power is off, locate the circuit
breaker on the panel board that services the DC circuit, switch the circuit
breaker to the off position, and tape the switch handle of the circuit breaker
in the off position.
To connect a power cable for a DC power supply:
Locate a replacement power cable that meets the specifications defined in
1.
Cable Specifications for the MX480 Router" on page
Verify that a licensed electrician has attached a cable lug to the replacement power
2.
cable.
Verify that the INPUT OK
3.
Secure the power cable lug to the terminal studs, first with the flat washer, then with
4.
the nut. Apply between 23 lb-in. (2.6 Nm) and 25 lb-in. (2.8 Nm) of torque to each
nut (see Figure 73 on page
torque-controlled driver or socket wrench.)
CAUTION: Ensure that each power cable lug seats flush against the surface
of the terminal block as you are tightening the nuts. Ensure that each nut
is properly threaded onto the terminal stud. The nut should be able to spin
freely with your fingers when it is first placed onto the terminal stud.
Applying installation torque to the nut when improperly threaded may
result in damage to the terminal stud.
Chapter 3: Initial Installation and Configuration
and
AC OK DC OK
LED is off.
214). Do not overtighten the nut. (Use a 7/16-in. [11 mm]
) position and
—
LEDs light steadily, and the
"DC Power
58.
213