Even if the ASR 5500 chassis will not be completely filled with cards, size the cables for maximum power
draw according to the above recommendations. This practice facilitates future expansion as more cards
are added and the power supply is appropriately incremented.
Important
Terminating Power Cables
Each cable should be terminated with a 90 degree, 2-hole lug (supplied). Each feed consists of a supply
(-48VDC) and return (RTN) cable. The feed cables terminate at the rear of each PFU on 0.25-inch posts
spaced 0.63-inch on center.
Cable Routing
All feed cables must be routed through the openings at the upper rear sides of the chassis.
Method of Connection
The method of connection at each PFU terminal is: flat washer, lug, lock washer and nut (7/16-inch). The
nut(s) must be torqued to 50 in-lb. (5.65 N-m).
Insulate Lugs
Use heat shrink tubing or non-conductive tape to insulate much of the exposed metal on the lug without
interfering with the attachment point.
Crimp Lugs on Cables
Use the Panduit
®
lugs supplied with the chassis (LCD4-14AF-L). The lug must be crimped to the end of a
ground cable using Panduit crimp tool part number CT-720-1 (die color: gray, P29). The wire strip length is
7/8-inch (22 mm).
Follow the OEM recommendations for preparing and crimping the lugs on the ends of each feed cable.
Label All Cables
Label the supply and return cables going to each terminal on the rear of the PFUs. Include the terminal number
(A-1 to A4, B1 to B4) and power distribution panel circuit number. This will facilitate troubleshooting, as
well as removal and replacement of a failed PFU.
ASR 5500 Installation Guide
82
Power Cabling
Terminating Power Cables
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