GE Industrial Solutions Spectra Series Power Panelboards AMCB2GM and AMCB3GM - Manual (Page 2)

2
2. Locate the side of the interior with a 2.75-inch
reference distance. The circuit breaker straps are
mounted on the side of the panel interior bus at
which the distance from the vertical bus face to the
inner face of the bus-support rail is 2.75 inches, as
indicated in Figure 2.
NOTE: The following assembly views show the
2.75-inch distance on the right. When this
reference distance is on the left, the proper
view is upside down.
Figure 2. Illustration of the 2.75-inch reference distance.
3. Assemble antiturn clips onto carriage bolts. Slide an
antiturn clip [4] over the square shank of each
carriage bolt [17], as shown in Figure 3. Figure 4
illustrates the installation of a bolt and antiturn clip
onto the interior, as called for in the remaining steps.
When the breaker cable connection is on the same
side as the 2.75" reference dimension of the interior,
as illustrated in Figure 2, then only three each (for kit
AMCB3GM) or two each (for kit AMCB2GM) of items
[4] and [17] are used, with no spacers [8, 9]. When
the cable connections are on the opposite side, then
six each (for kit AMCB3GM) or four each (for kit
AMCB2GM) of items [4] and [17] are used, along
with spacers [8, 9].
Figure 3. Assembling an antiturn clip [4] with a carriage bolt [17].
Figure 4. Installing a carriage bolt [17] and antiturn clip [4] into the
interior.
NOTE: If the breaker cable connection is on
the same side of the interior as the 2.75"
reference dimension, proceed with step 4. If
the cable connection is on the opposite side of
the interior as the 2.75" reference dimension,
proceed to step 5.
4. Strap assembly procedure with cable connection on
the same side as the 2.75" distance. For single-phase
and dc applications using the bus closest to the bus
support, go to step 4c. For single-phase and dc
applications using the middle vertical bus and the
vertical bus on the opposite side of the 2.75" reference,
go to step 4e.
4a. For three-phase assembly (kit AMCB3GM).
Position the carriage bolt [17] and antiturn clip
[4] assemblies as shown in Figures 5 and 6.
Figure 5. Carriage bolt and antiturn clip installation for three-phase
connections.
Figure 6. Carriage bolt and antiturn clip installation for three-phase
connections, isometric view.
4b. Install straps. Place the G frame single straps [5, 6,
7] over the carriage bolts and antiturn clips, as
shown in Figures 7 and 8. Place conical washers
[10] on the bolts and secure with nuts [14]. Leave
the connections finger tight.
If the group assembly selection is three-phase,
with the cable connections on the same side as
the 2.75" reference dimension, and the assembly
looks like Figure 8, then go to step 6.
Figure 7. Installing the straps for three-phase connections.
Edge of G
Frame
Edge of G
Frame
Edge of G
Frame
Edge of G
Frame