1. Introduction and Product Overview
This manual provides essential information for the safe and effective use of the Square D Schneider Electric QOB220CP 20 Amp Two-Pole Bolt-On Circuit Breaker. This device is designed to provide overload and short-circuit protection for electrical systems.
The QOB220CP is an ANSI-certified and UL-listed unit, rated for 120/240 VAC and 10,000 AIR. It features a bolt-on installation mechanism and includes the exclusive Visi-Trip indicator for easy identification of tripped breakers.
Figure 1: Front view of the Square D QOB220CP 20 Amp Two-Pole Bolt-On Circuit Breaker. It shows the "I/ON" and "O/OFF" positions, the 20 Amp rating, and the 10 kA 120/240V~ marking.
2. Safety Information
WARNING: Electrical shock hazard. Installation and servicing of this circuit breaker must be performed by qualified personnel only. Failure to follow these instructions can result in serious injury or death.
- Always disconnect power at the main service panel before installing or servicing circuit breakers.
- Verify that the voltage and current ratings of the circuit breaker match the requirements of your electrical system.
- Ensure all connections are tight and secure to prevent overheating and potential fire hazards.
- Do not use this device if it appears damaged or has been subjected to excessive force.
- Consult local electrical codes and the National Electrical Code (NEC) for proper installation procedures.
3. Product Features
The Square D QOB220CP circuit breaker incorporates several features designed for reliability and ease of use:
- Overload and Short-Circuit Protection: Designed to protect electrical circuits from excessive current, preventing damage to wiring and equipment.
- Visi-Trip Indicator: When the breaker trips, the handle moves to a midpoint position, and a highly visible red indicator appears, allowing for quick identification of the tripped breaker.
- Bolt-On Installation: Ensures a secure and reliable connection within compatible panelboards.
- Compatibility: Designed for use with Square D NQ or NQOD panelboards requiring two spaces.
- UL Listed and ANSI Certified: Meets recognized safety and performance standards.
Figure 2: Diagram illustrating the technical benefits of the thermal magnetic breaker, including protection against overloads and short-circuits, UL certification, 10kA interrupting capacity, Visi-Trip indicator, and compatibility with QO NQ/NQOD panelboards.
4. Specifications
| Attribute | Value |
|---|---|
| Brand | Schneider Electric |
| Model Number | QOB220CP |
| Current Rating | 20 Amps |
| Voltage Rating | 120/240 Volts AC |
| Number of Poles | 2 |
| Circuit Breaker Type | Thermal-Magnetic, Standard |
| Mounting Type | Bolt-On Mount |
| Interrupting Rating (AIR) | 10,000 Amps |
| Material | Copper |
| Dimensions (L x W x H) | 2.92 x 1.5 x 3.5 inches |
| Item Weight | 9.6 ounces |
| Certification | UL Listed, ANSI Certified |
Figure 3: Diagram showing the approximate dimensions of the circuit breaker: 2.91 inches in length, 1.50 inches in width, and 2.99 inches in height.
5. Setup and Installation
IMPORTANT: Installation of this circuit breaker should only be performed by a qualified electrician in accordance with all applicable electrical codes and safety standards. Incorrect installation can lead to electrical hazards, equipment damage, or personal injury.
General Installation Steps (Consult a Professional):
- Power Disconnection: Ensure all power to the electrical panel is turned off at the main service disconnect. Verify with a voltage tester.
- Panel Access: Carefully remove the cover of the electrical panel to expose the bus bars and existing breakers.
- Breaker Placement: Identify two available spaces in a compatible Square D NQ or NQOD panelboard.
- Mounting: Position the QOB220CP circuit breaker onto the bus bar. The bolt-on mechanism ensures a secure connection. Tighten the mounting screws according to manufacturer specifications.
- Wiring: Connect the circuit wires to the appropriate terminals on the circuit breaker. Ensure proper wire gauge and secure connections. Tighten terminal screws to the specified torque.
- Panel Reassembly: Replace the electrical panel cover, ensuring all wires are properly routed and not pinched.
- Power Restoration: Restore power to the main service panel.
Figure 4: Side view of the circuit breaker, highlighting the terminal screws for wire connections. Proper tightening of these screws is crucial for safe operation.
6. Operating Instructions
The QOB220CP circuit breaker operates with a simple ON/OFF toggle mechanism and includes a visual trip indicator.
- Turning ON: Push the handle firmly to the "I/ON" position.
- Turning OFF: Push the handle firmly to the "O/OFF" position.
- Tripped Condition: If an overload or short-circuit occurs, the breaker will automatically trip. The handle will move to a midpoint position between "ON" and "OFF", and a red Visi-Trip indicator will become visible.
- Resetting a Tripped Breaker: To reset a tripped breaker, first push the handle completely to the "O/OFF" position, then push it firmly to the "I/ON" position. If the breaker immediately trips again, there is likely a persistent fault in the circuit that requires investigation by a qualified electrician.
Figure 5: Angled view of the circuit breaker, clearly showing the toggle switch for ON/OFF operation and the Visi-Trip indicator window below the switch.
7. Maintenance
The Square D QOB220CP circuit breaker is designed for minimal maintenance. However, periodic inspection is recommended to ensure continued safe operation.
- Visual Inspection: Periodically inspect the circuit breaker for any signs of physical damage, discoloration, or loose connections.
- Dust and Debris: Ensure the area around the circuit breaker within the panel is free from dust and debris, which can impede heat dissipation.
- Professional Check: It is advisable to have a qualified electrician inspect your electrical panel and circuit breakers every few years, or immediately if you notice any unusual behavior.
8. Troubleshooting
If you experience issues with your QOB220CP circuit breaker, consider the following common scenarios:
- Breaker Trips Frequently:
- Overload: The circuit may be drawing more current than the breaker's 20 Amp rating. Reduce the load on the circuit by unplugging some devices.
- Short-Circuit: A direct connection between hot and neutral/ground wires can cause immediate tripping. This requires immediate professional inspection to locate and repair the fault.
- Ground Fault: If the circuit is protected by a Ground Fault Circuit Interrupter (GFCI) or Arc Fault Circuit Interrupter (AFCI) breaker (not this model, but relevant for the circuit), a ground fault or arc fault could be the cause.
- Breaker Does Not Reset:
- Ensure you are pushing the handle completely to the "O/OFF" position before attempting to reset to "ON".
- If it still does not reset, or immediately trips again, there is a persistent fault in the circuit. Do not force the breaker. Contact a qualified electrician.
- No Power to Circuit, Breaker is ON:
- Check for loose connections at the breaker terminals or within the circuit wiring.
- Verify that the main breaker in the service panel is ON.
- This could indicate an internal failure of the breaker or a wiring issue elsewhere. Contact a qualified electrician.
For any issues that cannot be resolved with these basic steps, or if you are unsure about the cause of a problem, always consult a qualified electrician.
9. Warranty and Support
Limited Lifetime Warranty: The Square D Schneider Electric QOB220CP Circuit Breaker is backed by a limited lifetime warranty. Please refer to the official Schneider Electric warranty documentation for full terms and conditions.
For technical support, product inquiries, or warranty claims, please contact Schneider Electric customer service or visit their official website. Contact information can typically be found on the product packaging or the Schneider Electric corporate website.
Online Resources: For additional information, product updates, and frequently asked questions, visit the Schneider Electric website.
