NQ/NQM Panelboards and QONQ Load Centers Class 1640 – Instruction Bulletin
80043-712-06

Installation

This section provides instructions for the following NQ panelboard and QONQ load center procedures:

Interior Mounting for Square D Brand Enclosures

A separate standards publication, titled “General Instructions for Proper Installation, Operation, and Maintenance of Panelboards Rated 600 Volts or Less” (NEMA PB1.1), has been provided with this equipment. Familiarize yourself with the content of this document before proceeding with any of the following procedures.

If you did not receive a copy of this document, or if you have any questions regarding this equipment, contact your local distributor or Schneider Electric representative.

NOTICE
HAZARD OF EQUIPMENT DAMAGE DUE TO LOOSE CONNECTIONS
  • Ensure all connections are properly tightened.
  • Refer to the torque information label provided on the panelboard before tightening the connections.
Failure to follow these instructions can result in equipment damage.

To properly mount and install the NQ panelboard or QONQ load center interior, please refer to the NEMA PB 1.1 standards publication, and follow the instructions below for either Surface Mounting (Enclosure Mounted on Wall) or Flush Mounting (Enclosure Recessed in Wall).

Surface Mounting (Enclosure Mounted on Wall)

  1. Mount the enclosure as instructed in the NEMA PB 1.1 standards publication.
  2. Remove the deadfront from the deadfront brackets.
  3. Install the interior as described below:
    1. Set the interior on the enclosure studs. An elevating screw is not required (See Interior Mounting for Square D Brand Enclosures).
    2. Tighten the Keps nuts against the interior side rails until the rails are against the back of the enclosure.
  4. Based on the application and adopted installation code, Neutral Bonding Strap and Line Side Barrier may be required. See the Neutral Bonding Strap/Cable Installation and Appendix 2: Accessory Kits.
  5. Apply equipment labels (located in the bag assembly) as directed by the instructions on the back of the equipment label sheet. Please consult local codes and standards.
  6. Remount the deadfront after wiring.

Flush Mounting (Enclosure Recessed in Wall)

  1. Mount the enclosure as instructed in the NEMA PB 1.1 standards publication.
  2. Remove the deadfront from the deadfront brackets.
  3. Install the interior as described below:
    1. Thread the (4) 10-32 x 0.875 in. self-tapping, elevating screws provided with the flush trim into the side rails.
    2. Set the interior on the enclosure studs (see Interior Mounting of Square D Brand Enclosures). Place the keps nuts onto the enclosure studs, but do not tighten.
    3. Adjust the screws so that the lip of the deadfront is approximately 0.25 inches (6.35 mm) from the wall line.
    4. Tighten the keps nuts against the side rails.
  4. Based on the application and adopted installation code, Neutral Bonding Strap and Line Side Barrier may be required. Please consult local codes and standards. See the Neutral Bonding Strap/Cable Installation and Appendix 2: Accessory Kits.
  5. Apply equipment labels (located in the bag assembly) as directed by the instructions on the back of the equipment label sheet.
  6. Remount the deadfront after wiring.

Interior Mounting of Square D Brand Enclosures

Neutral Bonding Strap/Cable Installation

Based on the application and the adopted installation code, a line side barrier and neutral bonding strap may be required.

To properly bond the neutral to the panelboard, follow the instructions for either 100 or 250 A Maximum NQ Panelboards, or 400 or 600 A Maximum NQ Panelboards and QONQ Load Centers.

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 or CSA Z462 or local equivalent.
  • Turn off all power supplying this equipment before working on or inside equipment.
  • Locking the manual operation or locking the motor cover does not disconnect the secondary motor circuit.
  • The neutral bonding strap/cable should be used only when the panelboard is installed as service entrance equipment.
  • Do not mix the mounting screws with the deadfront screws.
Failure to follow these instructions will result in death or serious injury.
NOTE: Refer to Line Side Barrier and Neutral Bonding Strap Kits for information.
NOTE: The terms “neutral bonding strap” and “neutral bonding cable”, describe the components which meet the requirements for a “neutral bonding conductor”. These are equivalent terms.

100 or 250 A Maximum NQ Panelboards

To install a neutral bonding strap on NQ panelboards with mains rated up to 225 A (with main lugs or main circuit breaker), or up to 250 A with a factory assembled main circuit breaker, refer to Bonding Strap Installation—100 or 250 A Maximum NQ Panelboards, and follow the instructions below.
  1. Align the bonding strap on the side rail, as pictured.
    NOTE: For some applications, it may be necessary to remove the lug (not pictured) before installing the bonding strap.
  2. Insert the two mounting screws, as pictured. Tighten the 10-32 screw to 10–12 lb.-in. (1.1–1.4 N•m) and the 1/4-20 to 25–30 lb.-in. (2.8–3.4 N•m).
    NOTE: Lug mounting screws are provided in the bonding strap bag assembly.
    1. If the lug was removed in step 1 above, reinstall it on top of the bonding strap.
    2. Use 1/4-20 x 9/16 in. screw in mounting for 100/225 A interiors with no options. Refer to note C and D for other options.
    3. Use the 1/4-20 screw x 11/16 in. lug mounting screw on applications with feed-through lug, sub-feed lug, sub-feed circuit breaker, or 200% neutral applications.
    4. Use the 1/4-20 x 7/8 in. lug mounting screw on applications with 200% neutrals and with feed-through lugs, sub-feed lugs, or sub-feed circuit breakers.

Bonding Strap Installation—100 or 250 A Maximum NQ Panelboards

NOTE: For bonding strap lug options, refer to C and D for the correct length of the 1/4-20 screw.

400 or 600 A Maximum NQ Panelboards and QONQ Load Centers

To install a neutral bonding cable on a 400 or 600 A maximum NQ panelboard and QONQ load center, refer to Bonding Cable Installation — 400 or 600 A Maximum NQ Panelboards and QONQ Load Centers, and follow the instructions below.
  1. Align the lug on the side rail mounting hole, as pictured.
  2. Tighten the lug mounting screw against the side rail to 10–12 lb.-in. (1.1–1.4 N•m).
  3. Align the bonding cable, as pictured, and insert it into the lug and neutral mounting holes.
  4. Tighten both the lug wire binding screw and the neutral wire binding screw to 45–50 lb.-in. (5.1–5.6 N•m).

Bonding Cable Installation — 400 or 600 A Maximum NQ Panelboards and QONQ Load Centers

QO and QOB Circuit Breaker Installation and Removal

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 or 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 equipment.
  • Locking the manual operation or locking the motor cover does not disconnect the secondary motor circuit.
  • Always use a properly rated voltage sensing device to confirm power is off.
  • All unused spaces must be filled with filler plates.
  • Replace all devices, doors, and covers before turning on power to this equipment.
Failure to follow these instructions will result in death or serious injury.
WARNING
hazard of personal injury or equipment Damage
  • This equipment is designed and tested by Schneider Electric™ to performance levels which meet Underwriter’s Laboratories® (UL®) standards and Mexican Official Standards (NOM) listing.
  • Use only Square D™ brand circuit breakers and accessories.
Failure to follow these instructions can result in death, serious injury, or equipment damage.

QO and QOB Circuit Breaker Installation

Refer to QO and QOB Circuit Breaker Installation and Removal, for the following instructions:
  1. Turn OFF all power to the panelboard.
  2. Turn the circuit breaker OFF.
  3. Remove the deadfront.
  4. Snap the wire terminal end of the circuit breaker onto the mounting rail.
  5. Engage the branch connector.
    For QO Circuit Breakers: Push inward until the plug-on jaws fully engage the branch connector.
    For QOB Circuit Breakers: Push inward until the circuit breaker connector is centered on the branch connector mounting hole. Engage the screw into the branch connector hole and tighten it to the torque values shown on the interior wiring and torque diagram.
  6. Install the load wire.
  7. Reinstall the deadfront.
  8. Install a filler plate in all branch circuit breaker spaces not used.

QO and QOB Circuit Breaker Removal

Refer to QO and QOB Circuit Breaker Installation and Removal, for the following instructions:
  1. Turn OFF all power to the panelboard.
  2. Remove the deadfront.
  3. Remove the load wire.
  4. Disengage the branch connector.
    For QO Circuit Breakers:

    Pull outward until the plug-on jaws fully disengage the branch connector.

    For QOB Circuit Breakers:

    Loosen the screw in the circuit breaker connector and pull the circuit breaker off of the branch connector.

  5. Snap the wire terminal end of the circuit breaker off of the mounting rail.
  6. Reinstall the deadfront.
  7. Install a filler plate in all branch circuit breaker spaces not used.

QO and QOB Circuit Breaker Installation and Removal

Circuit Breaker Reset Instructions

If the circuit breaker is tripped, the handle will be at the mid-position between ON and OFF. To reset the circuit breaker, push the handle to the OFF position, then to the ON position.

Circuit Breaker Handle Positions

NOTE: When the circuit breaker has tripped, the handle assumes a center position and the red Visi-Trip indicator appears in a window in the circuit breaker case. The red Visi-Trip indicator is only visible when the circuit breaker has tripped.

Deadfront Preparation

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 or CSA Z462 or local equivalent.
  • Before energizing the panelboard, all unused spaces must be filled with filler plates.
  • Replace all devices, doors, and covers before turning on power to this equipment.
Failure to follow these instructions will result in death or serious injury.

Deadfront Diagram
NOTE: The back of the deadfront lists the catalog number for the corresponding compatible filler plates.
QR Code is a registered trademark of DENSO WAVE INCORPORATED in Japan and other countries.

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