SQUARE D QO Outdoor Load Centers Instruction Manual

SQUARE D QO Outdoor Load Centers

Product Information

The product is a load center that can be used for electrical wiring and installation. It has a Class 1100 rating and requires proper precautions to be taken during installation to avoid death or serious injury. The load center can be mounted on a surface or in a box, and it comes with a mounting hole sealing gasket (A) for the upper mounting location. The load center has knockout holes for cable clamps or conduits, which can be removed according to the size required, as specified in Table 1. The load center also includes a green neutral bonding screw that can be installed if required by the local code.

Product Usage Instructions

1. Determine the wiring or conduit requirements for the main and branch circuits based on local electrical codes.
2. Select the proper cable clamp or use other approved methods to secure the cable or conduit to the enclosure.
3. Remove the appropriate knockouts required for the installation of cable clamps or conduits, as specified in Table 1. To remove the knockouts, refer to Figure 1.
4. Mount the load center on a surface or in a box using the mounting hole sealing gasket (A) provided in the bag assembly with the load center. Fasten the box to the wall with screws or nails using one mounting hole or two mounting knockout holes at the top and two mounting holes at the bottom. Refer to Figure 2.
5. Pull the conductors into the box and use approved wire clamps, conduit bushings, or other approved methods to secure the conductors to the box and prevent damage to the conductor insulation.
6. Connect the main and neutral conductors according to the load center wiring diagram. Make sure to connect the service ground, equipment grounding conductor, or both as required by local electrical code. Torque each terminal to the value specified on the load center wiring diagram attached to the box.
7. If required by local code, install the enclosed green neutral bonding screw through the hole in the neutral bar or plate. Thread the screw into the hole in the box and torque to the value specified on the card shipped with the bonding screw.

DANGER

HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH

• Apply appropriate personal protective equipment (PPE) and follow safe electrical work practices. See NFPA 70E.
• 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.
• Always use a properly rated voltage sensing device to confirm power is off.
• Replace all devices, doors, and covers before turning on the power to this equipment.
• Do not allow petroleum-based paints, solvents or sprays to contact the nonmetallic parts of this product.
• Before starting a wiring installation or addition, consult a local building or electrical inspector for current National Electrical Code requirements. Local codes vary, but are adopted and enforced to promote safe electrical installations. A permit may be needed to do electrical work, and some codes may require an inspection of the electrical work.
• This equipment may not be suitable for use in corrosive environments present in agricultural buildings. See NEC 547 or CEC 2–400.

Failure to follow these instructions will result in death or serious injury.

Preparation

1. Determine the wiring or conduit requirements for the main and branch circuits, as required by local electrical codes.
2. Select the proper cable clamp, or use other approved methods for securing the cable or conduit to the enclosure.
3. Remove the appropriate knockouts required for the installation of cable clamps or conduits (Table 1). To remove the knockouts, see Figure 1.

TABL. 1 : Bolt-on Conduit Hubs

NOTE: To be ordered separately for outdoor load centers.

Box Mounting

Surface Mounting

1. Use the mounting hole sealing gasket (A) (provided in a bag assembly with the load center) in the upper mounting location shown in Figure 2.
2. Fasten the box to the wall with screws or nails using one mounting hole or two mounting knockout holes at the top and two mounting holes at the bottom. See Figure 2.

Main Circuit Breaker or Main Lug Wiring

1. Pull the conductors into the box. Use approved wire clamps, conduit bushings, or other approved methods to secure the conductors to the box and prevent damage to the conductor insulation.

2. Connect the main and neutral conductors.

   • Install the main and neutral conductors according to the load center wiring diagram.
   • Connect the service ground, equipment grounding conductor, or both as required by the local electrical code.
   • Torque each terminal to the value specified on the load center wiring diagram attached to the box.

3. If required by local code, install the enclosed green neutral bonding screw through the hole in the neutral bar or plate. Thread the screw into the hole in the box and torque to the value specified on the card shipped with the bonding screw.
   NOTE: For all Canadian service entrance panels, the neutral bonding screw is factory-installed. See step 4.

4. If the main circuit breaker load center is not used as a service equipment panel, remove the neutral bonding screw and barrier, if provided.

5. For Canadian service equipment applications, reinstall the line termination area barrier (for load centers used as service equipment panels only). Secure barrier with retaining screws and torque screws to 35 lb-in. (4 N•m).

NOTE: Do not reinstall the barrier.

HAZARD OF PERSONAL INJURY OR EQUIPMENT DAMAGE
Use only Square D® brand circuit breakers and accessories, which are designed and tested by Square D to performance levels that meet or exceed applicable regulatory standards.
Failure to follow these instructions can result in death or serious injury.

Standard Branch Circuit Breakers—Installation

1. Turn OFF all power supplying the equipment before installing or removing circuit breakers.
2. Determine the wiring or conduit requirements for the circuit breaker.
3. Turn OFF the circuit breaker.
4. Install the wire terminal end of the circuit breaker to the mounting rail and push inward until the plug-on jaw fully engages the bus bar connector. Check the terminal end of the circuit breaker for engagement to the mounting rail.
5. Remove the insulation from the conductor as required. Install the conductor into the load terminal of the circuit breaker.
6. Torque each terminal to the value specified on the circuit breaker.
7. Torque each neutral and ground terminal to the value specified on the load center wiring diagram or box label attached to the enclosure box, cover, or trim.

Removal

1. Turn OFF (O) the circuit breaker. Remove the conductors.
2. Lift the plug-on end of the circuit breaker until the circuit breaker jaw disconnects from the bus bar. Continue lifting until the terminal end disengages from the mounting rail. See Figure 3.

Tandem Branch Circuit Breakers—Installation

Install QOT, CHOMT, and HOMT tandem-type circuit breakers only in single-phase load centers marked for use with tandem circuit breakers. In Canada, install CHOMT tandem-type circuit breakers in single-phase or QOT in single-phase or three-phase load centers marked for use with tandem circuit breakers. Refer to the wiring diagram on the load center for the installation location.

1. Turn OFF all power supplying the equipment before installing or removing circuit breakers.
2. Determine the wiring or conduit requirements for the circuit breaker.
3. Turn OFF the circuit breaker.
4. Install the wire terminal end of the circuit breaker to the mounting rail and push inward until the plug-on jaw fully engages with the bus bar connector. Check the terminal end of the circuit breaker for engagement to the mounting rail.
5. Remove the insulation from the conductor as required. Install the conductor into the load terminal of the circuit breaker.
6. Torque each circuit breaker terminal to the value specified on the circuit breaker.
7. Torque each neutral and ground terminal to the value specified on the load center wiring diagram or box label attached to the enclosure box, cover, or trim.

Removal

1. Turn OFF the circuit breaker. Remove the conductors.
2. Lift the plug-on end of the circuit breaker until the circuit breaker jaw disconnects from the bus bar. Continue lifting until the terminal end disengages from the mounting rail. See Figure 4.

NOTE: Class CTL tandem circuit breaker shown. Non-class CTL tandem circuit breaker does not have a mounting cam.

Installing the Trim

1. Remove the twist-outs with pliers at the center of the twist-out. See Figure 5. Remove only enough twist-outs to match the number of circuit breakers being installed.

2. Attach the Spanish and/or French translation label, if supplied with the load center, to the inside of the door.

3. Identify the circuit breakers on the directory label.

4. For service equipment, apply the “Service Disconnect” label(s) near the main circuit breaker handle(s). If the load center is not used as service equipment, apply the “Main” label to the cover near the main circuit breaker handle. See Figure 5.

5. Install the trim using the three screws provided. For the outdoor QO Main Lug only, single phase load centers that are 150-225 A, rated for 22,000 rms symmetrical amperes short circuit systems, four trim screws MUST be used
   (provided with load center). Install the fourth trim screw by removing the knockout on the interior trim and attaching the screw through the trim to the support bracket already installed. See Figure 5 for the knockout location.

6. Close any unused circuit breaker openings with the filler plates as listed on the trim directory label.

Energizing the load center

1. Before energizing the load center, turn OFF the main and all branch circuit breakers.
2. After power is turned ON to the load center, first turn ON the main circuit breaker (if installed) and then turn ON the branch circuit breakers.
3. Rotate the door latch counterclockwise to allow engagement through the door slot.
4. Close the door until secured by the latch.

Square D® is a trademark or registered trademark of Schneider Electric. Other trademarks used herein are the property of their respective owners.

Electrical equipment should be installed, operated, serviced, and maintained only by qualified personnel. No responsibility is assumed by Schneider Electric for any consequences arising out of the use of this material.

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