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.
CAUTION: The maximum torque rating of the terminal studs on the DC
power supply is 36 lb-in. (4.0 Nm). The terminal studs may be damaged
if excessivetorque is applied. Use only a torque-controlled driver or socket
wrench to tighten nuts on the DC power supply terminal studs.
The DC power supplies in slots PEM0 and PEM1 must be powered by dedicated power
feeds derived from feed A, and the DC power supplies in slots PEM2 and PEM3 must
be powered by dedicatedpower feedsderivedfrom feed B. This configuration provides
the commonly deployed A/B feed redundancy for the system.
8. Route the power cables along the cable restraint toward the left or right corner of the
chassis. If needed, thread plastic cable ties, which you must provide, through the
openings on the cable restraint to hold the power cables in place.
9. Replace the clear plastic cover over the terminal studs on the faceplate.
10. Verify that the power cables are connected correctly, that they are not touching or
blockingaccess to router components, and that they do not drape where peoplecould
trip on them.
11. Repeat Steps 3 through 10 for the remaining power supplies.
223Copyright © 2017, Juniper Networks, Inc.
Chapter 17: Connecting the MX480 Router to Power
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