Description
Greenlee GT-10GFI 120V Circuit Tester
Quickly identify faulty wiring and verify ground fault operation in seconds. The Greenlee® GT-10GFI 120V GFCI Circuit Tester provides electricians, maintenance personnel, and contractors with a fast, reliable diagnostic tool for standard 3-wire and GFCI receptacles.
Designed with a high-visibility, 3-light neon indicator pattern, this compact tester instantly diagnoses common electrical conditions: correct wiring, open ground, open neutral, open hot, hot/ground reversed, and hot/neutral reversed. The integrated push-button tests the proper trip function of ground fault circuit interrupters with a single press, ensuring residential and commercial circuits meet safety compliance.
- Instant Diagnostics: Clear neon indicator code chart printed directly on the housing enables rapid fault detection.
- Integrated GFCI Test Button: Verifies that ground fault circuit interrupter devices trip under simulated leakage current.
- Compact & Rugged: Pocket-sized, high-impact thermoplastic housing built to endure daily tool pouch wear and tear.
- Code Compliant: cULus and ETL certified to standard electrical testing requirements.
Specifications
| Attribute | Specification |
| Brand | Greenlee® |
| Model / Part # | GT-10GFI (GT10GFI / 12125) |
| Application | 120 VAC Grounded Outlets & GFCI Receptacles |
| Voltage Rating | 120 VAC |
| Receptacle Type | Standard 3-Wire 120V Outlets |
| Fault Detection | Open Ground, Open Neutral, Open Hot, Hot/Ground Reversed, Hot/Neutral Reversed, Correct Wiring |
| Certifications | cULus, ETL Listed |
| Warranty | Lifetime Limited Warranty |
Frequently Asked Questions
How do I test a GFCI receptacle with the Greenlee GT-10GFI?
Plug the tester into the energized GFCI outlet and verify that the neon indicator lights display the "Correct" wiring pattern. Then, press the GFCI test button. If the circuit interrupter trips and power cuts off instantly, the receptacle is operating correctly. Reset the outlet after testing.
What wiring faults can this tester identify?
The 3-light pattern quickly diagnoses six distinct conditions: correct wiring, open ground, open neutral, open hot, hot/ground reverse, and hot/neutral reverse.
Can this be used on 240V or ungrounded 2-wire outlets?
No. The Greenlee GT-10GFI is specifically engineered for standard 120 VAC 3-wire grounded outlets and receptacles. It is not rated for 240V circuits or 2-prong ungrounded outlets.
Does this unit require batteries to operate?
No batteries are needed. The GT-10GFI draws power directly from the energized 120V outlet to illuminate the diagnostic neon indicator lamps.
Product Specifications
selling_points: |
✔️ Instant Diagnostics: Clear LED light sequences quickly identify correct or faulty wiring on 120V grounded electrical outlets. ✔️ GFCI Validation: Built-in testing capability. |
category_bullets: |
• Greenlee GT-10GFI Circuit Tester Core: 120V AC polarity cube and circuit tester quickly diagnoses grounded outlets and tests GFCI receptacles using clear LED indicators. • 120V AC Rating. • GFCI Testing. |
