Qcad321 Junction Box Assembly Installation - Northern Telecom Meridian SL-1 Installation Manual

Chart 2-9

QCAD321 JUNCTION BOX ASSEMBLY INSTALLATION

The QCAD321 junction box assembly is equipped with power and control wiring enclosed in a
flexible conduit 5.5 ft (1675 mm) long. The junction box should be installed on the floor or on
the wall within 5 ft (1525 mm) of the cabinet.
When suppression of Electromagnetic Interference (EMI) is a requirement, wiring should be run
in metallic conduit between the QBL15 battery distribution box and the QCAD321 junction box
assembly. The QBL15 battery distribution unit and the junction box are capable of accepting
1
1 / in conduit.
4
STEP PROCEDURE
The QBL15 battery distribution units should be installed before attempting to install the
QCAD321 junction box assembly.
1 Unpack the QCAD321 junction box assembly and dispose of the packing material.
2 Mount the junction box on a wall or locate on floor within 5 ft (1525 mm) of the
cabinet.
3 Remove screws securing cover to function box and remove cover.
4 Remove front and rear covers from cabinet.
5 Service in the cabinet will be interrupted when performing this step on an operating
cabinet.
Set the AC BRKR breaker on the faceplate of the -48 V rectifier in the cabinet to OFF.
Set breakers on the faceplates of the power distribution units (QUX19, QUX20,
QUX21) to OFF.
6 If not previously disconnected, disconnect the power line cord from the commercial
power supply.
7 Remove the EMI shield (if equipped) from the bottom rear of the cabinet.
8 If the first SDI port is equipped with a connector (Fig. 2-9), remove port mounting
screws and pull SDI connector away from cabinet.
9 Remove the lock nut from the 90° elbow on the end of the flexible conduit containing
wiring from the QCAD321 junction box.
10 Insert the wires and the 90° elbow in the hole at the rear of the cabinet to the right of
the cabinet power cord.
Chart Continued
Installation and connections 2-41
Appendix 1 to 553-2601-200