Cisco ASR 5500, Installation Manual

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The eight power terminals on the back of each PFU are shipped with nuts and washers attached.
Important
Step 1 Remove the plastic power input cover from the top-rear of the ASR 5500 chassis. Use a Phillips #2 head screw driver
to loosen the two captive screws securing the cover to the chassis. Removing this cover exposes the power feed terminals
at the rear of the PFUs.
Step 2 Remove one nut, a lock washer and a flat washer from each of the eight terminals; leave the bottom nut on each terminal.
The nuts on the PFU terminals require a 7/16-inch nut driver or socket wrench for removal.
Step 3 Before proceeding, verify that the bottom nuts on all terminals are torqued to 50 in-lb. (5.65 N-m).
Step 4 Slide a 1.25 in. (3.2 cm) length of heat shrink tubing over the end of each feed cable. You can skip this step if you choose
to use non-conductive tape to insulate the crimp portion of the 2-hole lug.
Step 5 Crimp a 2-hole 90o lug to each -48 VDC and Return cable.
Step 6 Slide the heat shrink tubing over the crimp portion of the lug until it contacts the flat attachment point. Use a heat source
to warm the tubing until it tightly wraps the metal. Alternatively, you can firmly wrap the crimp portion of the lug with
a non-conductive tape.
Step 7 Thread each cable through an opening in the side of the chassis and route it to the appropriate terminal (-48V 1, Return
1, -48V 2, Return 2, etc.). Rectangular openings are provided at the sides of the chassis for this purpose. See the figure
below.
Do not route any cables through openings in the plastic power input cover. The openings are for air flow
only.
Caution
Step 8 Install each lug over the two terminals.
Step 9 Secure each lug to the terminals with flat washers, lock washers and nuts. Tighten the nuts while holding the lug
perpendicular to the attachment studs and maintaining as much separation as possible with adjacent cables. The nuts
should be torqued to 50 in-lb. (5.65 N-m).
The supply and return lugs for each power feed will be separated by the ridge in the insulating spacer shown
in Detail A of the figure below.
Important
After all feeds are attached, move/push all cables to verify there are no potential shorts.
To avoid the risk of fire, take proper precautions to ensure that the power supply and return lugs are not
touching.
Caution
Step 10 Continue installing the feeds on the terminals until all power feed connections have been completed to both PFUs.
Step 11 Reinstall the plastic terminal cover on the top-rear of the chassis.
To avoid the risk of personal injury and/or potential damage to the system, never operate the chassis without
the power input cover.
Caution
ASR 5500 Installation Guide
84
Power Cabling
Connect Power Feeds to the PFUs