Installing Upgrade Kit Nt4G13Aw (From Four To Five Cabinets) - Northern Telecom DNC-50 Installation Manual

Installing Upgrade Kit NT4G13AW (From Four to Five Cabinets)

This procedure describes how to expand a -48 Vdc system from four to five
cabinets. The kit consists of one cable (NT4G09CH A0331640) and a label.
This procedure consists of removing one existing power cable #2 from the old
distribution box (to be placed in cabinet 5), and connecting the existing distribution
box (in cabinet 2) to the new distribution box with the new jumper cable. Install the
removed power cable #2 in the new distribution box. See Figures 17-1 and 17-2 for
the locations of the input and distribution boxes, Fig.17-5 for the wiring for the bus
bar, and proceed as follows:
(1) Power down the -48 Vdc system by moving the circuit breaker located in the
(2) Remove the eight screws securing the front cover plate to the distribution box in
(3) Remove the cover plate.
(4) Loosen the two screws on the strain relief on the distribution box in cabinet 2
(5) Loosen, but do not remove, the screw in each of the three bus bars that secure
(6) Loosen and remove the nut and washer holding the green wire from power
(7) Remove the cable from the distribution box in cabinet 7.
(8) Insert the new power jumper cable end through the now empty strain relief in
(9) Place the ring terminal from the green wire over the stud in the lower part of the
(10) Place the flat washer over the ring terminal, and secure with the nut removed
(11) Insert the stripped ends of the red, black, and white wires into the through
(12) Securely clamp the wires in place by tightening the screws.
(13) Repeat the above steps to secure the other end of the power jumper cable in the
input box to the OFF position.
cabinet 2.
that secure power cable #2 (NT4G09BH A0331639). This cable connects the
box in cabinet 2 to one of the power converters in cabinet 3.
the red, black, and white wires of power cable #2. This cable connects the box
in cabinet 2 with the power converter in cabinet 3.
cable #2 to the stud in the lower portion of the box.
the distribution box located in cabinet 2. Ensure that approximately 1/4-inch of
cable jacket protrudes through the strain relief and into the box.
distribution box.
previously.
holes of the bus bars. Ensure that all of the strands of each wire are in the hole
and that each wire is in the correct bus bar.
Note: Maintain the color code on the wires so that the wires that are inserted
match the colors of those wires that were factory installed.
new distribution box.
Note: The power jumper cable should enter the new distribution box through
the bottom-right side of the box as viewed when installed.
Installing a -48 Vdc Power Distribution System 159
Practice 450-1011-201