Model 6 Motor Control Centers – Instruction Bulletin PDF
80459-641-01, Rev. 09

Power Bus Splicing MCCs with Single Bar/Phase Splice Kit (600 A and 800 A, Copper Horizontal Bus, 65,000 A Short Circuit or Less, Shipped after August 2012)

NOTE: The integral splice kit used on shipments September 2012 and later, containing 600/800 A, copper, horizontal bus with a short circuit withstand current rating £ 65,000 A RMS consists of a single bar per phase and does not use a fork type bus (see Correct Application of Splice (shown installed) for 600/800 A, Non-Fork Bus). DO NOT use the single bar per phase splice on the fork end of the fork type bus (see Incorrect Application of Single-Bar Splice on Fork-Type Bus for incorrect application). Two splice bars must be used on the fork end of the fork type bus (see Power Bus Splicing MCCs with Multiple Bar/Phase Splice Kit). Contact your local Schneider Electric representative if the necessary two-bar splice is not provided with your equipment.

Correct Application of Splice (shown installed) for 600/800 A, Non-Fork Bus

Incorrect Application of Single-Bar Splice on Fork-Type Bus

  1. Remove all four bolts from the integral splice bar (see Remove Bolts from Single-Splice Bar).

    Remove Bolts from Single-Splice Bar

  2. Move the single splice bar to the left and align the two left holes in the splice bar with the corresponding holes in the horizontal bus on the left section (see Move and Align the Splice Bar to the Bus Holes).

    Move and Align the Splice Bar to the Bus Holes

  3. Reinstall the four bolts into the horizontal bus on the left and right sections (see Insert Splice Bolts in the Left and Right Sections). Make sure the original conical washers are reinstalled with the concave side facing the horizontal bus (see Place a Conical Washer Under the Bolt Head).

    Insert Splice Bolts in the Left and Right Sections

    Place a Conical Washer Under the Bolt Head

  4. Torque all bolts on both ends to 31–32 lb-ft (41.87–43.22 N•m). (See Torquing the Bolts.)

    Torquing the Bolts

  5. Return to Step 2 in Splicing Power Bus for Type 1 and Type 12 Enclosures for all phases and for the neutral bus (if supplied). When all splices are complete, go to Step 6.

  6. Before energizing the equipment, slide the horizontal bus barriers into the closed position and replace all covers.

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