Northern Telecom DNC-50 Installation Manual page 173

166 Installing a -48 Vdc Power Distribution System
(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
(14) Remove the horizontal jumpers connecting cabinets 7 and 8 and the vertical
(15) Remove the two nuts from the studs on the rear of cabinet 8.
(16) Place the new distribution box on the studs on the rear of cabinet 8.
(17) Secure the distribution box to the rear panel of cabinet 8 with the two nuts
(18) Finish securing the box to the cabinet by driving the two screws supplied with
(19) Attach the power cable #2 that was removed from cabinet 5 to the power
(20) Lightly secure the connector backshell to the cabinet backpanel with two
(21) Engage the power converter to ensure proper alignment.
(22) Fully tighten the screws holding the backshell.
(23) Remove the snap-in hole cover from the bottom of the distribution box located
(24) In the empty hole in the distribution box, install the strain relief supplied with
(25) Insert the cable end through the empty strain relief in the distribution box
(26) Securely tighten the clamping screws on the strain relief.
(27) Remove a nut and washer from one of the empty studs in the lower portion of
Practice 450-1011-201
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.
jumpers located on cabinet 8.
removed previously.
the box through the ears of the box and into the nuts located on the rear panel of
the cabinet.
converter in cabinet 7.
1/2-inch screws.
in cabinet 8.
the new power cable #2.
Note: It may be necessary to remove the small access cover from the bottom of
the distribution box in order to tighten the locknut on the inside of the box.
located in cabinet 8. Ensure that approximately 1/4-inch of cable jacket
protrudes through the strain relief and into the box.
the box.