1. Introduction
This manual provides essential information for the safe installation, operation, and maintenance of the Eaton GFTCB120 Cutler-Hammer Ground Fault Circuit Breaker (GFCI). This device is designed to protect against electrical shock by detecting ground faults and quickly disconnecting power. Please read this manual thoroughly before installation or use.
2. Safety Information
WARNING: Risk of electric shock or fire. Installation and servicing of this circuit breaker must be performed by a qualified electrician in accordance with all national and local electrical codes. Always turn off power at the main service panel before working on electrical circuits.
- Do not install or operate this device if it appears damaged.
- Ensure proper wire gauge (14-4 AWG) is used for connections.
- Verify that the voltage (120/240 Vac) and current rating (20 Amp) match your electrical system requirements.
- Never bypass the GFCI protection.
3. Product Overview
The Eaton GFTCB120 is a 1-pole, 20 Amp, 120/240 Vac Ground Fault Circuit Interrupter (GFCI) designed for plug-on mounting in compatible Eaton Cutler-Hammer load centers. It features a 10 kAIC interrupt capacity.
Key Features:
- Ground Fault Protection: Automatically senses hot wire-to-ground faults and quickly shuts off power to prevent electrical shock.
- Auto-Monitoring Function: Provides periodic automatic testing of the GFCI mechanism.
- Alert Indication: If the self-test detects that GFCI protection might be compromised, it indicates an alert.
- Plug-on Mounting: Designed for easy installation in compatible panels.
Figure 1: Eaton GFTCB120 Cutler-Hammer Ground Fault Circuit Breaker. This image shows the front view of the circuit breaker, highlighting its compact design and labeling.
4. Installation and Setup
IMPORTANT: All installation procedures must be performed by a qualified electrician. Ensure power is disconnected at the main service panel before proceeding.
- Power Disconnection: Turn off the main power supply to the electrical panel where the circuit breaker will be installed. Verify power is off using a voltage tester.
- Panel Access: Remove the cover of the electrical panel.
- Mounting: Position the GFTCB120 circuit breaker onto the appropriate bus bar in the load center. Ensure it is securely seated for plug-on mounting.
- Wiring:
- Connect the load hot wire (black or colored) to the terminal marked 'LOAD'.
- Connect the load neutral wire (white) to the terminal marked 'LOAD NEUTRAL'.
- Connect the pigtail neutral wire from the breaker to the neutral bus bar in the panel.
- Ensure all connections are tight and secure. The breaker accommodates 14-4 AWG wire.
- Panel Reassembly: Replace the electrical panel cover.
- Power Restoration: Restore power to the main service panel.
5. Operation
Once installed and power is restored, the Eaton GFTCB120 GFCI circuit breaker is ready for operation.
- Normal Operation: In normal conditions, the breaker will remain in the 'ON' position, supplying power to the circuit.
- Ground Fault Detection: If a ground fault is detected, the breaker will automatically trip to the 'OFF' position, interrupting the power supply to the circuit.
- Auto-Monitoring: The GFCI performs periodic self-tests to ensure its protective function is operational. If a potential compromise is detected, an alert will be indicated.
- Resetting the Breaker: If the breaker trips, move the handle completely to the 'OFF' position, then back to the 'ON' position. If it immediately trips again, a persistent fault exists.
6. Maintenance
The Eaton GFTCB120 GFCI circuit breaker requires minimal maintenance due to its auto-monitoring capabilities.
- Monthly Test: It is recommended to manually test the GFCI monthly by pressing the 'TEST' button on the breaker. The breaker should trip immediately. Reset the breaker by moving the handle to 'OFF' then 'ON'. If it does not trip, the unit may be faulty and should be replaced by a qualified electrician.
- Visual Inspection: Periodically inspect the breaker for any signs of physical damage, discoloration, or loose connections.
- Cleaning: Ensure the area around the breaker is free from dust and debris. Do not use liquids to clean the breaker.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Breaker trips immediately after reset. | Persistent ground fault in the circuit or connected appliance. | Disconnect all appliances from the circuit. Reset the breaker. If it holds, reconnect appliances one by one to identify the faulty device. If it still trips with no load, consult a qualified electrician to inspect the wiring. |
| Breaker does not trip when 'TEST' button is pressed. | GFCI mechanism is faulty. | The breaker is not providing ground fault protection. It must be replaced by a qualified electrician immediately. |
| Breaker trips intermittently. | Intermittent ground fault, moisture, or faulty appliance. | Check for moisture in outlets or appliances. Test appliances individually. If the issue persists, consult a qualified electrician. |
| Alert indication (if applicable). | GFCI protection may be compromised. | Perform a manual test. If the issue persists or the breaker fails the test, replace the breaker. |
8. Specifications
- Brand: Eaton
- Model Number: GFTCB120
- Circuit Breaker Type: GFCI (Ground Fault Circuit Interrupter)
- Current Rating: 20 Amps
- Voltage: 120/240 Vac
- Number of Poles: 1
- Interrupting Rating (AIC): 10 kAIC
- Mounting Type: Plug-In Mount
- Wire Gauge Compatibility: 14 - 4 AWG
- Product Dimensions: Approximately 30"D x 8"W x 6"H (Note: These dimensions appear to be for packaging, actual breaker dimensions are smaller)
- Item Weight: Approximately 2.4 ounces
- Material: Copper (for internal components/contacts)
- UPC: 786680129773
9. Warranty and Support
For warranty information, technical support, or service inquiries regarding the Eaton GFTCB120 circuit breaker, please contact Eaton customer service directly or visit their official website. Keep your purchase receipt as proof of purchase.
Eaton Official Website: www.eaton.com
