NF/NFOM Panelboards Class 1670 – Instruction Bulletin
80043-741-03

Installation

This section provides instructions for the following NF/NFOM panelboard 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 NF panelboard, 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. (Interior Mounting of Square D Brand Enclosures).
    2. Tighten the flange nuts against the interior side rails until the rails are against the back of the enclosure. Do not over tighten. Over tightening the flange nuts can cause the interior to bow out in the center.
  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 Neutral Bonding Strap 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.

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 provided elevating nuts on the enclosure studs.
    2. Set the interior on the enclosure studs (see Interior Mounting of Square D Brand Enclosures ). Place the flange nuts onto the enclosure studs, but do not tighten.
    3. Adjust the elevating nuts so that the lip of the deadfront is approximately 0.25 in. (6.35 mm) from the wall line.
    4. Tighten the flange 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 Neutral Bonding Strap 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 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 125 or 250 A Maximum NF Panelboards, 400 or 600 A Maximum NF Panelboards, or 800 A Maximum NF Panelboards.

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 should be used only when the panelboard is installed as service 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.

125 or 250 A Maximum NF Panelboards

To install a neutral bonding strap on a 125 or 250 A maximum NF panelboard, refer to Bonding Strap Installation—125 or 250 A Maximum NF 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 screw to 25–30 lb.-in. (2.8–3.4 N•m).
    NOTE: If the lug was removed in Step 1, reinstall it on top of the bonding strap. Use the 1/4-20 x 3/4 in. mounting screw. Lug mounting screws are provided in the bonding strap bag assembly.

Bonding Strap Installation—125 or 250 A Maximum NF Panelboards

400 or 600 A Maximum NF Panelboards

To install a neutral bonding strap on a 400 or 600 A maximum NF panelboard, refer to Bonding Strap Installation—400 or 600 A Maximum NF Panelboards and follow the instructions below.

  1. Align the two bonding straps on the side rail, as pictured.
    NOTE: For some applications, it may be necessary to remove the lug before installing the bonding strap.
  2. Insert the three mounting screws, as pictured. Tighten the 10-32 screw to 10–12 lb.-in. (1.1–1.4 N•m) and the two 1/4-20 screws to 60–65 lb.-in. (6.8–7.3 N•m).
    NOTE: If the lug was removed in Step 1 above, reinstall it on top of the bonding straps. Use the 1/4-20 x 1 1/8 in. mounting screws. Lug mounting screws are provided in the bonding strap bag assembly.

Bonding Strap Installation—400 or 600 A Maximum NF Panelboards

800 A Maximum NF Panelboards

To install a neutral bonding strap on an 800 A maximum NF panelboard, refer to Bonding Strap Installation—800 A Maximum NF Panelboards, and follow the instructions below.
  1. Align the two bonding straps on the side rail, as pictured.
  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 screw to 60–65 lb.-in. (6.8–7.3 N•m).

Bonding Strap Installation—800 A Maximum NF Panelboards

ECB, EDB, EGB, and EJB 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 all 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.

ECB, EDB, EGB, and EJB Circuit Breaker Installation

Refer to ECB, EDB, EGB, and EJB 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. With the bolt-on connector end of the circuit breaker slightly elevated, insert the mounting foot into the slot in the phase cover.
  5. Rotate the circuit breaker down and back until the captive screw(s) align with the tapped holes in the circuit breaker connectors.
  6. Engage the screw into the branch connector hole and tighten it to the torque values shown on the interior wiring and torque label.
  7. Install the load wire.
  8. Reinstall the deadfront.
  9. Install a filler plate in all branch circuit breaker spaces not used.

ECB, EDB, EGB, and EJB Circuit Breaker Removal

Refer to ECB, EDB, EGB, and EJB Circuit Breaker Installation and Removal, for the following instructions:
  1. Turn off all power to the panelboard.
  2. Remove the deadfront.
  3. Turn the circuit breaker off.
  4. Remove the load wire.
  5. Loosen the screw(s) in the circuit breaker connector and lift the circuit breaker off of the panelboard.
  6. Reinstall the deadfront.
  7. Install a filler plate in all branch circuit breaker spaces not used.

ECB, EDB, EGB, and EJB 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 ina 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.

Panelboards Equipped with Motor Operators for PowerPacT H- and J-Frame Circuit Breakers

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 be installed and serviced only by properly trained qualified electrical personnel according to OSHA 1910.331 through 1910.335.
  • Turn off all power sources supplying this equipment and de-energize all primary and secondary circuits 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 equipment is de-energized.
  • Always practice lock-out tag-out procedures according to OSHA requirements.
  • Do not disable, remove or modify any mechanical, electrical interlock or safety feature.
Failure to follow these instructions will result in death or serious injury.
QR Code is a registered trademark of DENSO WAVE INCORPORATED in Japan and other countries.

Was this helpful?

Contact Information
Legal Information
Privacy Policy
Change your cookie settings