1. Introduction
This manual provides essential information for the safe and proper installation, operation, and maintenance of the Eaton Cutler-Hammer CHB120 1-Pole 20A Circuit Breaker. This device is designed to protect electrical circuits from overcurrents and short circuits, ensuring the safety of your electrical system and connected equipment. Please read this manual thoroughly before any installation or operation.
2. Safety Information
WARNING: Electrical shock hazard. Improper installation or maintenance can result in serious injury or death. All work on electrical systems should be performed by qualified personnel only. Always disconnect power at the main service panel before working on or near circuit breakers.
- Ensure all power is OFF before installation or servicing.
- Use appropriate personal protective equipment (PPE).
- Verify voltage and current ratings match your application.
- Do not use damaged circuit breakers.
- Follow all local and national electrical codes.
3. Product Features
- Model: CHB120
- Poles: 1 Pole
- Voltage Rating: 120/240 Volt
- Current Rating: 20 Amp
- Interrupting Rating: 10kA@120V
- Type: Standard Circuit Breaker
- Mounting: Panel Mount
4. Specifications
| Specification | Value |
|---|---|
| Brand | Eaton |
| Model Number | CHB120 |
| Current Rating | 20 Amps |
| Voltage Rating | 120/240 Volts |
| Number of Poles | 1 |
| Circuit Breaker Type | Standard |
| Mounting Type | Panel Mount |
| Interrupting Rating | 10kA@120V |
| Product Dimensions | 7 x 7 x 7 inches (approximate) |
| Item Weight | 7 pounds (approximate) |
| UPC | 704798904778 |
5. Installation
Installation of circuit breakers should only be performed by a qualified electrician in accordance with all applicable electrical codes and standards. The following steps are for informational purposes only and do not substitute for professional expertise.
- Disconnect Power: Turn off the main power supply to the electrical panel at the utility meter or main disconnect. Verify power is off using a voltage tester.
- Remove Panel Cover: Carefully remove the cover of the electrical panel.
- Identify Slot: Locate an available slot on the bus bar for the 1-pole CHB120 circuit breaker.
- Install Breaker: Hook the rear of the circuit breaker onto the retaining clip on the panel's bus bar. Press the front of the breaker firmly until it snaps into place.
- Connect Wiring: Connect the circuit wire (hot wire) to the terminal screw on the circuit breaker. Ensure the wire is properly stripped and the screw is tightened to the manufacturer's specified torque.
- Replace Panel Cover: Once all connections are secure and verified, replace the electrical panel cover.
- Restore Power: Turn the main power supply back on.
Figure 1: Eaton Cutler-Hammer CHB120 1-Pole 20A Circuit Breaker. This image displays the Eaton Cutler-Hammer CHB120 circuit breaker, a single-pole device with a 20 Amp rating. It features a white toggle switch for ON/OFF/TRIPPED states and screw terminals for electrical connections. The model number 'CHB120' is visible on the label.
6. Operation
The CHB120 circuit breaker has three primary positions for its toggle switch:
- ON: The circuit is energized, and power is flowing. The toggle is typically pushed fully towards the "ON" marking.
- OFF: The circuit is de-energized, and power is interrupted. The toggle is typically pushed fully towards the "OFF" marking.
- TRIPPED: When an overcurrent or short circuit occurs, the breaker automatically trips to protect the circuit. The toggle will move to an intermediate position, usually between ON and OFF. To reset a tripped breaker, first push the toggle firmly to the full OFF position, then push it to the full ON position.
7. Maintenance
Circuit breakers generally require minimal maintenance. However, periodic visual inspection is recommended:
- Inspect for any signs of physical damage, discoloration, or burning.
- Ensure all connections are tight. (WARNING: Disconnect power before checking connections).
- Keep the electrical panel area clean and free from obstructions.
8. Troubleshooting
If your CHB120 circuit breaker frequently trips, consider the following:
- Overloaded Circuit: The most common cause of tripping. Disconnect some appliances or devices from the circuit to reduce the load.
- Short Circuit: A direct connection between hot and neutral/ground wires can cause a trip. Inspect wiring and connected devices for damage.
- Ground Fault: If current leaks to the ground, it can cause a trip (though this breaker is not a GFCI).
- Faulty Appliance/Device: A malfunctioning appliance connected to the circuit can cause repeated tripping. Unplug devices one by one to identify the culprit.
- Faulty Breaker: In rare cases, the circuit breaker itself may be defective. If all other causes are ruled out, consult a qualified electrician for inspection and potential replacement.
If you are unable to resolve the issue, contact a qualified electrician.
9. Warranty and Support
Specific warranty information for the Eaton Cutler-Hammer CHB120 circuit breaker is typically provided at the point of purchase or included with the product packaging. For detailed warranty terms, technical support, or service inquiries, please refer to the official Eaton website or contact Eaton customer service directly.
You can visit the Eaton website for more information: www.eaton.com
