Figure 213: Connecting Power Cables To The Dc Power Distribution Module - Juniper MX2020 Hardware Manual

MX2020 3D Universal Edge Router Hardware Guide
464
25 lb-in. (2.8 Nm) of torque to each nut (see
the nut. (Use a 7/16-in. [11 mm)] 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 the nut is improperly threaded
may result in damage to the terminal stud.
CAUTION: The maximum torque rating of the terminal studs on the DC
PDM is 25 lb-in. (33.89 Nm). The terminal studs may be damaged if
excessive torque is applied. Use only a torque-controlled driver or socket
wrench to tighten nuts on the DC PDM terminal studs.

Figure 213: Connecting Power Cables to the DC Power Distribution Module

D
Grounding points
(on chassis)
Route the positive and negative DC power cables through the plastic cable restraint
5.
cover. Make sure that the cable does not touch or obstruct any router components.
Verify that the DC power cable is connected correctly, that it does not touch or block
6.
access to router components, and that it does not drape where people could trip on
it.
Attach the power cable to the DC power source.
7.
Figure 128 on page
Cable
Flat
Terminal
lug
washer
studs
Split
washer
Nut
Copyright © 2015, Juniper Networks, Inc.
269). Do not overtighten