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

Joining to the Left Side of an Existing Type 3R MCC Enclosure.

Removing the End Deflector

  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 end deflector (see Removing the End Deflector) from the leftmost section of the existing MCC and the end deflector, if supplied, from the rightmost section of the MCC being added. Discard both end deflectors. Retain the hardware for installation of new parts.

  3. Remove the back plate from the leftmost section of the existing MCC and also from the rightmost section of the MCC being added. Retain the back plates and mounting hardware for re-installation.

  4. Remove the end plate (see Removing the End Deflector) from the leftmost section of the existing MCC and the end plate, if supplied, from the rightmost section of the MCC being added. Discard both end plates. Retain the hardware for installation of new parts.

  5. Remove the insulating barrier (see Figure Removing the Insulating Barrier) from the leftmost section of the existing MCC by punching out the rivets that are holding the barrier in place. Repeat this procedure for the barrier, if supplied, in the rightmost section of the MCC being added. Discard both barriers.

    NOTE: Ensure that rivet parts do not fall into the MCC.

    Removing the Insulating Barrier

  6. Install the deflector bracket (see Installing the Deflector Bracket) on the rightmost section of the MCC being added using two 8-32 Phillips head screws included in the kit. The same holes from which the rivets were removed will be used to mount the deflector bracket. Ensure that the top holes of the bracket align with the holes in the top plate of the enclosure.

    Installing the Deflector Bracket

  7. Attach a left splice bracket (see Installing the Deflector Bracket), 90 in. (2286 mm) long, to the front corner channel of the rightmost section of the MCC being added using six 1/4–20 screws contained in the kit. Ensure that the short flange is flush with the front of the corner channel and that the holes in the bracket line up with the holes in the corner channel.

  8. Install a left splice bracket (see Installing the Deflector Bracket), 90 in. (2286 mm) long, to the rear corner channel of the rightmost section of the MCC being added using six 1/4–20 screws contained in the kit. Ensure that the short flange is flush with the back of the corner channel and that the holes in the bracket line up with the holes in the corner channel.

  9. Attach a right splice bracket (see Installing the Deflector Bracket), 94 in. (2388 mm) long, to the left splice bracket installed in Step 7 using six 10–32 flat Phillips head screws contained in the kit. Ensure that the short flange is behind the flange of the left splice bracket. The right splice bracket will extend below the left splice bracket by approximately 1 in. (25 mm) when properly installed.

  10. Install a right splice bracket (see Installing the Deflector Bracket), 94 in. (2388 mm) long, to the left splice bracket installed in Step 8 using six 10–32 flat Phillips head screws contained in the kit. Ensure that the short flange is in front of the flange of the left splice bracket. The right splice bracket will extend below the left splice bracket by approximately 1 in. (25 mm) when properly installed.

  11. Position the structures that are to be spliced. Check that the fronts are flush to ensure proper alignment of all components.

  12. Splice sections using the instructions in the Model 5 Instruction Bulletin (8998IM9101R5/92) if joining to a Model 5 MCC, or the instructions in Splice Gaskets for Type 1 Gasketed, Type 1 Sprinkler-Resistant, and Type 12 Enclosures of this instruction bulletin if joining to a Model 6 MCC.

    NOTE: When splicing the horizontal bus between the new and existing MCC sections, remove the splice bars contained in the leftmost section of the existing MCC. Discard the splice bars. Install the horizontal bus splice assembly provided in this kit using the instructions beginning in Splicing Power Bus for Type 1 and Type 12 Enclosures of this bulletin. Use the remaining six 1/4–20 hex head screws provided in the kit to splice the corner channels of the existing MCC to the right splice brackets installed in Steps 9 and 10.

    Re-attaching the Back Plates

    Front

  13. Using the 10–32 hex head screws removed in Step 3, re-attach the back plate (see Re-attaching the Back Plates) to the rightmost section of the new MCC. Install the back bracket (see Installing the Deflector Bracket) under the back plate using the left side holes of the back bracket. Ensure that the notch at the top of the back bracket is installed toward the new MCC section.

  14. Using the 10–32 screws removed in Step 3, re-attach the back plate (see Re-attaching the Back Plates) to the right section.

  15. Install the splice deflector (see Installing the Deflector Bracket) to the rightmost section of the MCC being added. Use the five 1/4–20 screws supplied in the kit. Ensure that both top plate flanges are covered.

  16. Install five of the 1/4–20 screws removed in Step 2 through the splice deflector and into the top plate of the leftmost section of the existing MCC.

  17. Using the six 10–32 screws supplied in the kit, secure the right front vertical channel of the new Type 3R enclosure to the left front vertical channel of the existing Type 3R enclosure.

    NOTE: Install the screws through the clearance holes in the left front vertical channel of the existing MCC into the right front vertical channel of the new MCC.

  18. Before energizing the equipment, replace all covers and barriers.

QR Code is a registered trademark of DENSO WAVE INCORPORATED in Japan and other countries.

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