80459-641-01E Model 6 Motor Control Centers
10/2012 Section 4—Installing the MCC
© 1999–2012 Schneider Electric All Rights Reserved
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ENGLISH
To splice the power bus, follow these steps:
1. Turn off all power supplying this equipment before working on or inside
the equipment, and follow lockout/tagout procedures. Always use a
properly rated voltage sensing device to confirm the power is off.
2. Remove the horizontal wireway covers and slide the horizontal bus
barriers to gain access to the captive splice connectors (see Figure 50).
See Appendix A for the steps for removing horizontal bus barriers.
NOTE: On the integral splice assembly, located on the left side of each
phase bus, the number of bus links is one greater than the number of
horizontal bus bars. This creates a sandwich splice. The rear-most
splice link contains the captive nuts.
3. Remove all four bolts from each splice assembly (see Figure 51).
4. Slide the splice assembly to the left until the two left holes are in line with the
corresponding holes in the horizontal bus on the left section (see Figure 52).
5. Reinstall all four bolts through the splice assembly and into the
horizontal bus (see Figure 53); make sure the original conical washers
are reinstalled with the concave side facing the splice bus (see
Figure 54).
Figure 50: Wireway Covers Removed and
Horizontal Bus Barriers Open
Figure 51: Removing the Bolts from the
Splice Assembly
Figure 52: Aligning the Splice and Bus Holes
Figure 53: Inserting the Splice Bolts
Figure 54: Place a Conical Washer Under the Bolt Head
Bolt
head Conical
washer
Spacer
Bus bars
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