DERRICK EX, Maintenance & Operation Manual

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EX, SGX VIBRATOR MOTORS
Connecting Motor Cord To Junction Box
Motor leads may be connected inside a round or rectangular junction box. If a round junction box
is installed, the motor leads are connected to the machine leads with wire nuts and tape (Figure
5). If a rectangular junction box is present, the leads are connected to the terminal block shown in
Figure 6 for dual motors or Figure 7 for a single motor. Refer to the schematic diagram in your
equipment manual for additional assistance in connecting single or dual vibrator motor(s). The
following procedures cover all types of installations. Select the procedure that applies to the
electrical configuration of your machine.
Motor Power Connections to Round Junction Box
1. For machines having an elbow installed in a round junction box, wrap leads loosely with
electrical tape to facilitate threading through elbow in conduit.
2. Pass leads through junction box elbow and into junction box (Figure 5). Thread front gland nut
into junction box elbow, and tighten securely. Thread rear gland nut onto front gland nut, and
tighten securely. Thread and tighten backnut onto cable gland. Using wire nuts and electrical
tape, connect leads to corresponding wire colors inside junction box as shown.
Note! In dual-motor machines, be sure to connect one motor in reverse
polarity so that motors rotate in opposite directions.
Motor Power Connections to Rectangular Junction Box
1. Pass leads into junction box (Figures 6 and 7), and thread front gland nut into junction box
and tighten securely.
2. Thread and tighten rear gland nut onto front gland nut.
3. Thread and tighten backnut onto rear gland nut.
4. Insert wire colors into proper locations on terminal block as shown, noting that for dual-motor
machines leads for one motor are reversed. Tighten terminal screws to secure leads.
Note! In dual-motor machines, be sure to connect one motor in reverse
polarity so that motors rotate in opposite directions.
14 01 May 09