1. Introduzione
The NOYAFA NF-824 is a versatile and essential tool designed for electrical professionals, home maintenance workers, and DIY enthusiasts. It accurately identifies circuit breakers on energized 90-230V AC electrical systems, performs GFCI outlet tests, and detects non-contact voltage (NCV). Featuring an HD LCD screen with signal strength display and adjustable sensitivity, this device simplifies electrical troubleshooting and enhances safety.
This manual provides detailed instructions for the safe and effective use of your NF-824 Circuit Breaker Finder and GFCI Outlet Tester.
2. Informazioni di sicurezza
Always prioritize safety when working with electrical systems. Failure to follow these safety guidelines may result in electric shock, fire, or personal injury.
- Leghjite è capisce tutte e struzzioni prima di utilizà u dispusitivu.
- Ùn aduprate micca u dispusitivu s'ellu pare dannighjatu o ùn funziona micca currettamente.
- Ensure the electrical system is within the specified voltage range (90-230V AC) before testing.
- Always wear appropriate personal protective equipment (PPE), such as safety glasses and insulated gloves, when working with electricity.
- Ùn pruvate micca d'apre o di mudificà l'apparechju. Cunfidate tutta a manutenzione à persunale qualificatu.
- Mantene u dispusitivu luntanu da l'acqua è l'umidità.
- Use caution when testing live circuits. Avoid touching exposed wires or terminals.
- A funzione NCV hè solu per indicazione; verificate sempre u vulumetage with a contact voltage tester before touching wires.
- Do not rely solely on this device for critical safety decisions. Always follow local electrical codes and safety practices.
3. Cuntenutu di u pacchettu
Verificate chì tutti l'articuli sò presenti in u vostru pacchettu:
- 1x NF-824 Circuit Breaker Finder (Transmitter and Receiver)
- 1x 3-prong to 2-prong adapter
- 1x Light socket adapter
- 1x Alligator clip adapter
- 1x Cavo di ricarica Type-C
- 1x Manuale d'utilizatore
- 1x Custodia di trasportu

Figure 1: Complete accessory kit and carrying case for the NF-824.
4. Produttu Finituview
4.1. Transmitter (Outlet Tester)
- Test Plug: Connects to standard electrical outlets.
- Master Control Screen: Display LCD chì mostra u voltage, wiring status, and GFCI trip time.
- Pulsante di putenza: Accende / spegne u trasmettitore.
- Pulsante HOLD: Blocca a lettura attuale di u display.
- GFCI Button: Initiates a GFCI test.
- LED Indicatore di Statu: Red/Green light indicating wiring faults.
- Portu di carica Type-C: Per ricaricà a batteria interna.

Figure 2: Transmitter (Outlet Tester) in use, showing correct wiring and voltage.
4.2. Receiver (Breaker Finder)
- NCV Indicator Light: Flashes when non-contact voltage hè rilevatu.
- Master Control Screen: LCD display showing signal strength and NCV status.
- Interruttore di sensibilità: Adjusts the detection level (7 levels).
- Pulsante di putenza: Accende / spegne u ricevitore.
- Luce LED: Built-in flashlight for dark environments.
- Portu di carica Type-C: Per ricaricà a batteria interna.

Figure 3: Receiver scanning a circuit breaker panel.
5. Setup
5.1. Carica iniziale
Both the transmitter and receiver are equipped with built-in 3.7V lithium batteries. Before first use, fully charge both units using the provided Type-C charging cable. A full charge typically takes a few hours. The battery indicator on the LCD screen will show charging status.

Figure 4: Charging the NF-824 units via Type-C.
5.2. Attaching Adapters (If Needed)
Depending on your testing requirements, attach the appropriate adapter to the transmitter:
- 3-prong to 2-prong adapter: For testing older 2-prong outlets.
- Light socket adapter: For testing light bulb sockets.
- Alligator clip adapter: For direct connection to wires or terminals (use with extreme caution).
6. Operating Instructions
6.1. Circuit Breaker Finding
- Cunnette u trasmettitore: Insert the NF-824 transmitter into the electrical outlet or fixture you wish to trace. Ensure it is securely connected. The transmitter's LCD will display the voltage and wiring status.
- Activate the Receiver: Press and hold the power button on the receiver for a few seconds to turn it on. The receiver will enter "SCAN" mode.
- Ajuste a sensibilità: Use the sensitivity switch on the side of the receiver to set the desired detection level. Start with a lower sensitivity and increase if needed.
- Scan the Breaker Panel: Slowly move the tip of the receiver along the circuit breakers in the electrical panel. Maintain a consistent speed and distance from each breaker.
- Identify the Breaker: The receiver will provide visual (flashing light on the tip, signal strength on LCD) and audible (beeping) indications when it detects the correct circuit breaker. The strongest and most consistent signal indicates the target breaker.
- Verificate: Once identified, turn off the suspected breaker and check if the power to the original outlet/fixture is cut.

Figure 5: Receiver displaying signal strength while scanning.
Video 1: Demonstration of the NOYAFA NF-824 Circuit Breaker Finder in action, showing how to identify the correct breaker in a panel.
6.2. GFCI Outlet Testing
- Cunnette u trasmettitore: Insert the transmitter into a GFCI-protected outlet.
- Check Wiring Status: Observe the LCD display for the initial wiring status (e.g., "CORRECT").
- Perform GFCI Test: Press the "GFCI" button on the transmitter. The GFCI outlet should trip, cutting power to the outlet. The transmitter's display will show the trip time.
- Reset GFCI: Reset the GFCI outlet by pressing its reset button.
Note: If the GFCI does not trip, it may be faulty and should be inspected by a qualified electrician.
6.3. Non-Contact VoltagTestu e (NCV)
- Activate NCV: The receiver automatically enters NCV mode when powered on.
- Scan for Voltage: Move the tip of the receiver near electrical wires, outlets, or devices.
- Detect Voltage: Se AC voltage is present, the NCV indicator light on the receiver's tip will flash, and the LCD will show a signal strength bar. The intensity of the light and the number of bars indicate the strength of the detected voltage.

Figure 6: Receiver performing an NCV test on a cable.
6.4. Wiring Condition Detection
When the transmitter is plugged into an outlet, its LCD screen provides clear visual feedback on the wiring condition. The red/green indicator lights, combined with details on the large screen, can accurately diagnose 6 common wiring faults:
- Cablaggio currettu
- Terra aperta
- Apertura neutru
- Open Hot
- Calda/Neutra Inversata
- Calda / Terra Invertitu

Figure 7: Transmitter displaying different wiring fault conditions.
7. Mantenimentu
- Pulizia: Asciugate l'apparechju cù un pannu asciuttu è dolce. Ùn aduprate micca detergenti abrasivi o solventi.
- Conservazione: Conservate l'apparechju in a so custodia in un locu frescu è asciuttu quandu ùn hè micca in usu.
- Cura di a batteria: Recharge the batteries regularly, even if the device is not used frequently, to maintain battery health.
- Ispezione: Periodically inspect the device and accessories for any signs of damage.
8. Risoluzione di prublemi
- No Power on Device: Assicuratevi chì u dispusitivu sia cumpletamente caricu. Appughjà è tene premutu u buttone d'accensione per uni pochi secondi.
- Inaccurate Breaker Identification:
- Adjust the receiver's sensitivity.
- Ensure the transmitter is securely plugged into the circuit being traced.
- Scan the breakers slowly and consistently.
- Minimize interference from other electrical devices.
- GFCI Test Fails:
- Ensure the outlet is indeed GFCI protected.
- If the GFCI does not trip, the outlet or its wiring may be faulty. Consult a qualified electrician.
- NCV ùn rileva micca u vulumetage:
- Ensure the receiver is powered on and in NCV mode.
- Verify that the circuit is live.
- Adjust sensitivity if necessary.
9. Specificazioni
| Feature | Specificazione |
|---|---|
| Model No. | NF-824 |
| Portu di carica | USB Type-C (5V) |
| Auto Off | 30 minuti |
| Alerta di Potenza Bassa | Iè |
| Outlet Tester Screen | Segment Code LCD |
| Outlet Tester Plug Type | CN, US, EU |
| Outlet Tester Battery | 3.7V 390mAh Litiu |
| Outlet Tester Max Operating Current | <50 mA |
| Outlet Tester Charging Current | 500 mA |
| Outlet Tester Standby Current | ≤10uA |
| Receiver Product Size | 60x38.5x132.5 mm |
| Pantalla di u ricevitore | Segment Code LCD |
| Ajustamentu di a Sensibilità di u Ricevitore | 7 Livelli |
| Receiver NCV Range | ≥ AC 90 V |
| Receiver Signal Strength Indicator | 7 Ingranaggi |
| Luce LED di ricevitore | Iè |
| Batteria di ricevitore | 3.7V 700mAh Litiu |
| Receiver Max Operating Current | <100 mA |
| Receiver Charging Current | 700 mA |
| Receiver Standby Current | ≤10uA |
10. Garanzia è Support
For warranty information, technical support, or service inquiries, please refer to the product packaging or contact NOYAFA customer service directly. Keep your purchase receipt as proof of purchase.