GE Industrial Solutions Spectra Series Power Panelboards AMCB2GM and AMCB3GM - Manual (Page 6)

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Figure 27. Installing the straps for single-phase applications with
connections to the middle vertical bus.
Figure 28. Installing the straps for single-phase applications with
connections to the middle vertical bus, isometric view.
6. Install the circuit breaker mounting bracket. Secure
the breaker mounting bracket [3] to the panel side
rail with thread-forming screws [2]. Figures 29 and 30
show the installation for cable connections on the
same side as the the 2.75" reference dimension.
Figures 31 and 32 show the installation for cable
connections on the opposite side from the 2.75"
reference dimension. Tighten the thread-forming
screws to 30 in-lb.
7. Install circuit breakers. Figure 33 illustrates circuit
breaker installation. For main breaker operation,
position the device so that the load- or
OFF -side
terminals rest on the straps and the opposite side is
supported by the mounting bracket. For single-branch
operation, mount the breaker so that the line- or
ON -
side treminals rest on the straps and the opposite side
rests on the mounting bracket.
Align the holes in the breaker housing with the
corresponding holes in the mounting bracket. Fasten
the breaker to the bracket with the machine screws
[17] and flat washers [16] and tighten to 50 in-lb.
Attach the breaker terminals to the threaded holes in
the straps with the bolts [13] and conical washers
[11]. Tighten each terminal to 75 in-lb.
NOTE: Straps may require minor adjustments
for proper hole alignment.
Figure 29. Installing the breaker mounting bracket for cable
connections on the same side as the 2.75" reference dimension.
Figure 30. Installing the breaker mounting bracket for cable
connections on the same side as the 2.75" reference dimension,
isometric view.
Figure 31. Installing the breaker mounting bracket for cable
connections opposite the 2.75" reference dimension.
Figure 32. Installing the breaker mounting bracket for cable
connections opposite the 2.75" reference dimension, isometric view.
Edge of G Frame
Edge of G Frame