Juniper PTX5000 Quick Start Manual page 30

12. Route the negative (–) DC source power cable lug through the right cable restraint.
13. Attach the negative (–) DC source power cable lug to the –48V (input) terminal, located on the right
(see Figure 18 on page
Use a 10-mm nut driver to tighten the nut.
CAUTION:
Applying excessive torque damages the terminal studs and power supply. The maximum
torque that may be applied to this nut is 99 lb-in. (11 Nm).
CAUTION:
The power source cables might be labeled (+) and (–) to indicate 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.
CAUTION:
power feeds derived from feed A, and all inputs on the DC PDU in slot PDU1 must
be powered by dedicated power feeds derived from feed B. This configuration provides
the commonly deployed A/B feed redundancy for the system.
31).
You must use an appropriate torque-controlled tool to tighten the nuts.
You must ensure that power connections maintain the proper polarity.
All inputs on the DC PDU in slot PDU0 must be powered by dedicated
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