Introduction
This manual provides essential information for the safe installation, operation, and maintenance of the Eaton CHFCAF120 Single Pole Arc Fault Circuit Interrupter (AFCI) Circuit Breaker. Please read all instructions carefully before beginning any work. Proper understanding and adherence to these guidelines are crucial for safe and effective use of this electrical device.
Safety Information
WARNING: Risk of electric shock or electrocution. Installation and servicing of this circuit breaker must be performed by a qualified electrician. Always turn off power at the main service panel before working on electrical circuits. Failure to do so can result in serious injury or death.
CAUTION: This device protects against arc faults. It is not a substitute for Ground Fault Circuit Interrupters (GFCIs) where required by electrical codes. Ensure all local and national electrical codes are followed during installation.
Product Features
The Eaton CHFCAF120 AFCI Circuit Breaker is designed to provide enhanced protection against electrical fires caused by arc faults. Key features include:
- Single Pole design for individual circuit protection.
- 20 Amp current rating suitable for various residential applications.
- 120 Volt operation for standard household circuits.
- Advanced arc fault detection technology to identify and interrupt dangerous arcing conditions.
- Plug-in mount for easy installation in compatible Eaton Type CH load centers.
Specifications
| Brand | Eaton |
| Model | CHFCAF120 |
| Current Rating | 20 Amps |
| Voltage | 120 Volts |
| Circuit Breaker Type | AFCI (Arc Fault Circuit Interrupter) |
| Number of Poles | 1 |
| Mounting Type | Plug-In Mount |
| Product Dimensions | 1.3 x 3.5 x 6 inches |
| Item Weight | 0.8 ounces |
Installation
IMPORTANT: Ensure all power to the electrical panel is OFF before proceeding with installation. Use appropriate personal protective equipment, including safety glasses and insulated gloves. If you are not a qualified electrician, do not attempt installation.
Installation Steps:
- Power Disconnection: Locate the main service panel and turn off the main circuit breaker to de-energize the entire panel. Verify power is off using a non-contact voltage tester on all circuits you intend to work on.
- Panel Access: Carefully remove the cover of the electrical panel, following manufacturer guidelines.
- Breaker Placement: Identify an available slot in the Eaton Type CH load center. The CHFCAF120 is a single-pole breaker and requires one slot.
- Wire Connection: Connect the circuit's hot wire (typically black or red) to the terminal on the AFCI breaker labeled 'LOAD'. Tighten the screw securely to the torque specified by the panel manufacturer. Connect the neutral wire from the circuit to the neutral terminal on the AFCI breaker. Then, connect the white pigtail neutral wire from the AFCI breaker to the neutral bus bar in the panel. Refer to the wiring diagram for your specific panel for precise connections. Ensure all connections are tight and secure. For a 20 Amp breaker, use 12 gauge wire.
- Mounting: Align the breaker with the bus bar and firmly push it into place until it is securely seated. Ensure the pigtail neutral is properly connected and not pinched.
- Panel Cover: Carefully replace the electrical panel cover, ensuring no wires are pinched.
- Power Restoration: Turn the main circuit breaker back ON.

Operation
The Eaton CHFCAF120 AFCI Circuit Breaker operates automatically to detect and interrupt arc faults. When an arc fault is detected, the breaker will trip, cutting off power to the affected circuit to prevent potential electrical fires.
Resetting the Breaker:
- Identify Tripped Breaker: A tripped AFCI breaker will typically be in an intermediate position between ON and OFF, or fully in the OFF position.
- Turn OFF: Firmly push the breaker handle to the full OFF position. This ensures the internal mechanism is reset.
- Turn ON: Firmly push the breaker handle to the full ON position.
- If the breaker immediately trips again, there may still be an arc fault or an overload condition on the circuit. Investigate and resolve the cause before attempting to reset again. Do not repeatedly reset a tripping breaker without addressing the underlying issue.
Testing
Regular testing of the AFCI breaker is recommended to ensure proper operation and continued protection. Test the breaker monthly.
Test Procedure:
- Locate Test Button: The AFCI breaker has a 'TEST' button on its face, usually colored white or yellow.
- Press Test Button: With power ON to the circuit, press and hold the 'TEST' button. The breaker should immediately trip to the OFF position, cutting power to the circuit.
- Reset Breaker: Reset the breaker by first pushing the handle to the full OFF position, then to the full ON position.
- If the breaker does not trip when the test button is pressed, it may be faulty and should be replaced by a qualified electrician immediately.
Maintenance
The Eaton CHFCAF120 AFCI Circuit Breaker requires minimal maintenance. Periodically inspect the breaker for any visible damage, discoloration, or loose connections. Ensure the area around the electrical panel is clear and free from obstructions to allow for proper ventilation and access. Do not attempt to open or repair the breaker yourself.
Troubleshooting
Common Issues and Solutions:
- Breaker trips frequently: This indicates an arc fault or an overloaded circuit. Begin by unplugging or turning off all appliances and devices on the affected circuit. Reset the breaker. If it holds, plug in devices one by one to identify the faulty appliance or overloaded section. If the issue persists with no devices connected, consult a qualified electrician to inspect the wiring for arc faults.
- Breaker does not reset: Ensure the breaker is pushed fully to the OFF position before attempting to push it to ON. If it still does not reset, there may be a persistent fault on the circuit, or the breaker itself may be damaged. Do not force the breaker. Consult a qualified electrician.
- Breaker does not trip during test: If pressing the test button does not cause the breaker to trip, the AFCI function may be compromised. The breaker should be replaced by a qualified electrician immediately to ensure continued safety.
Warranty Information
For specific warranty details, including terms, conditions, and duration, please refer to the documentation provided with your original purchase or visit the official Eaton website. It is recommended to retain your proof of purchase for any warranty claims.
Customer Support
For technical assistance, product inquiries, or further support, please contact Eaton customer support. Contact information, including phone numbers and online resources, can typically be found on the Eaton website or product packaging. When contacting support, please have your product model number (CHFCAF120) and any relevant purchase details available.





