Splicing MCC Power Bus
 DANGER |
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Hazard of Electric Shock, Explosion, or Arc Flash
Failure to follow these instructions will result in death or serious injury.
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Applicable to All MCC Power Bus Splices
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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.
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Remove the horizontal wireway covers and slide or remove the horizontal bus barriers to gain access to the captive splice connectors (see Horizontal Wireway Covers and Bus Barriers Removed). See Removal and Installation of Horizontal Bus Barrier Panels.
Horizontal Wireway Covers and Bus Barriers Removed
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Locate integral splice plates. Splice plates are generally located on the left end of the MCC main bus in each shipping split. With some constructions, the splice assembly may be included as a kit-packaged in a carton and secured inside the MCC structure.
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When reinstalling splice hardware after completing the splice connection, make sure the original conical washers are reinstalled with the concave side facing the horizontal bus (see Conical Washer Under the Bolt Head).
Conical Washer Under the Bolt Head
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Before energizing the equipment, place the horizontal bus barriers into the closed position and replace all covers.
Refer to instruction bulletin 80459-641-01, Model 6 Motor Control Centers, for additional details on installing MCC power bus splices.