Figure 109: Disconnecting Power Cables From The Dc Power Supply - Juniper Core Router T Series Hardware Manual

T320 Core Router Hardware Guide
250
Make sure that the voltage across the DC power source cable leads is 0 V and that
1.
there is no chance that the cables might become active during the removal process.
CAUTION: You must ensure that power connections maintain the proper
polarity. The power source cables might be labeled
their polarity. There is no standard color coding for DC power cables. The
color coding used by the external DC power source at your site determines
the color coding for the leads on the power cables that attach to the
terminal studs on each power supply.
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. For more information about ESD,
see "Preventing Electrostatic Discharge Damage to a T320 Router" on page
Switch the circuit breaker on the power supply faceplate to the off position (
3.
Remove the clear plastic cover protecting the terminal studs on the faceplate.
4.
Remove the nuts and washers from the terminal studs (see
5.
(Use a 7/16–in. nut driver or pliers.)

Figure 109: Disconnecting Power Cables from the DC Power Supply

Remove the cable lugs from the terminal studs.
6.
Loosen the captive screws on the cable restraint on the right edge of the power supply
7.
faceplate.
Carefully move the power cables out of the way.
8.
Loosen the captive screws on the lower corners of the power supply faceplate
9.
completely. Twist the ejector handles on the upper corners of the faceplate
counterclockwise to unseat the power supply.
(+) and (–) to indicate
330.
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Figure 109 on page
Copyright © 2018, Juniper Networks, Inc.
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250).