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Fig. 5 Access to LH Splice Plate connections
JOINING INCOMPATABLE SECTIONS
Joining a Freedom 21 00 Motor Control Center to the
equipment such as Type W and 11 -300 Control Centers
will usually involve a transition section, installed between
the two varieties of equipment. This transition section
will be detailed on drawings provided by Cutler Hammer
and the applicable contact drawings. If provided sepa-
rately, it should be installed first. Review the overall in-
stallation task to determine whether the transition sec-
tion should be attached to the existing equipment or to
the Freedom 21 00 section, before it is move into place,
and select the sequence which will provide best access
to bus splicing and joining of the structures.
Fig. 6 Single Bar Splice Kit
SPLICE PLATES
Each splice plate kit consists of short pieces of bus bar
the same width as the main horizontal bus of the MCC
the kit is shipped with, four bolts per phase, an appropri-
I.B. 8926-1
ate quantities of related hardware. For a single bus bar
per phase the hardware is used as shown in Figure 6 for
either 16" or 20" deep enclosures. Eachsplice plate is
punched with rectangular holes to accept a square shank
carriage bolt that will not rotate as the nut is tightened.
Where the MCC is built with two horizontal bus bars per
phase, the splice plates are installed as shown in Figure
7. The top edge of Figures 7 through 1 0 represents the
back side of the MCC. The top portion of each of these
figures applies to 20" deep enclosures and the lower
portion to 16" deep enclosures. Note that for all but the
single-bar per phase (Figure 6) installation, the 16" deep
enclosures require the use of a nut plate that is mounted
with the same carriage bolt used to attach the horizontal
bus bars to the channel-shaped insulators. Install these
nut plates before mounting the splice plates. Tighten
the splice plate bolts with a driving torque of 275 pound-
inches (23 pound-feet).
Fig. 7 Double Bar Splice Kit
Fig. 8 Triple Bar Splice Kit
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