Model 6 Motor Control Centers – Instruction Bulletin PDF
80459-641-01, Rev. 10

Pull Box Installation

DANGER
Hazard of Electric Shock, Explosion, or Arc Flash
  • Apply appropriate personal protective equipment (PPE) and follow safe electrical work practices. See NFPA 70E, NOM-029-STPS, CSA Z462, or local equivalent.
  • This equipment must only be installed and serviced by qualified electrical personnel.
  • Turn off all power supplying this equipment before working on or inside it.
  • Always use a properly rated voltage sensing device to confirm power is off.
  • Replace all devices, doors, and covers before turning on power to this equipment.
  • Do not drill or cut in the top area of the motor control center.
  • Avoid contaminating the motor control center with dust or debris.
  • DO NOT lift the cabinet by the pull box or by attaching lifting angles to the pull box.
Failure to follow these instructions will result in death or serious injury.

This section contains instructions for installing pull boxes on low voltage MCCs. Pull boxes are either 12 or 18 in. (304.8 or 457.2 mm) high and mount on the top of the MCC.

NOTE:

  • Do not install the pull box until the MCC is in its final location.

  • Retain all hardware.

Standard Low Voltage MCC Pull Box

  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 power is off.

  2. Remove the 3/8 in. (9.525 mm) bolts, washers, and the lifting angle (see Remove the Hardware).

    Remove the Hardware

  3. Remove the 10-32 screws that secure the top closing plate to the top of the cabinet (see Remove the Hardware).

  4. Remove the top closing plate from the structure.

  5. Remove the front panel from the pull box. Position the pull box on top of the cabinet as shown in Install the Pull Box.

    Install the Pull Box

  6. Install the two 3/8 in. (9.525 mm) bolts and washers that were removed in step 2. Place them through the pull box lower side channels and into the top of the cabinet. Torque the bolts to 28–33 lb-in. (3.164–3.729 N•m).

  7. Re-install the pull box front panel removed in step 5 and the top closing plate removed in step 4 (see Install the Pull Box).

Vented Low Voltage MCC Pull Box

  1. Follow the same instructions for standard pull box installation (see Standard Low Voltage MCC Pull Box), except remove and discard the top closing plate from the MCC section. The vented pull box comes with a solid top plate.

    Install the Pull Box

Line-side Isolation, Low Voltage MCC Pull Box

  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 power is off.

  2. Remove the 3/8 in. (9.5 mm) bolts, washers, and the lifting angle (see Remove the Hardware).

    Remove the Hardware

  3. Remove the 10–32 in. (4.8 mm) screws and vented hood (see Remove the Hardware).

  4. Remove the 10–32 in (4.8 mm) screws and horizontal cross bus front cover (see Remove the Hardware).

  5. Remove the pull box front cover for installation access (see Install the Pull Box).

    Install the Pull Box

  6. Install 1/2 in. (12.7 mm) bolts and washers from inside the cabinet through the top closing plate and to the front pull box channel. Complete the connection with a washer and nut on the inside of the pull box.

  7. Install two 1 /4 in (6.4 mm) screws on the pull box rear channel and to the top closing plate.

  8. Install the two 3/8 in. (9.5 mm) bolts and washers that were removed in step 2. Place them through the lower side flanges of the vented hood, and into the top of the cabinet. Torque the bolts to 28–33 lb-in. (3.164–3.729 N•m).

  9. Re-install the pull box front cover removed in step 5 (see Install the Pull Box) and the top horizontal wireway cover removed in step 4.

Sprinkler-resistant Low Voltage MCC Pull Box

Refer to Removing the Lifting Angles and Hardware for the following steps.

Removing the Lifting Angles and Hardware

  1. Uninstall and discard the lifting angles (A) by removing the 3/8 in. bolts and washers (B) securing them.

  2. Remove and discard the top closing plate (C) from the MCC section by removing the 10-32 screws (D) securing it.

    NOTE: For main sections with ArcBlok 1200 technology, do not remove the top closing plate (C) since the pull box is installed over it. Remove only the 10-32 screws (D).

    Refer to Installing the Pull Box.

    Installing the Pull Box

  3. Remove the front panel (E) from the pull box (F) by removing the 10-32 screws (G) securing it.

  4. Position the pull box on top of the MCC section frame (for standard sections) or on top of the closing plate (for main sections with ArcBlok 1200 technology).

    NOTE: The overhang located at the top of the pull box must be facing the front of the MCC section.

  5. Install the two 3/8 in. bolts and washers (B) removed in step 1. Place them through the pull box lower side channels and into the top of the MCC section.

  6. Re-install the pull box front panel removed in step 3.

  7. Remove the two 10-32 screws (H) located on the side of the pull box near the bottom.

  8. Remove the two 10-32 screws, 3/8 in. bolt, and washer located on the top closing plate of the adjacent MCC section (I).

  9. Install the pull box splice angle (J) re-using the hardware removed in steps 7 and 8.

NOTE: If the drip hood pull box will be installed on top of a MCC section located in the middle of two other MCC sections, a pair of pull box splice angles will be provided, one per side. For this configuration, repeat steps 7–9 to install the splice angles on both sides.
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