ABB / General Electric THQL1120GF GFCI Miniature Circuit Breaker

The THQL1120GFT is the direct replacement for the legacy THQL1120GF. The 'T' designates the addition of an automatic self-test feature, introduced to comply with updated UL 943 standards for GFCI breakers. As noted in the product details, the newer self-testing GFT version will ship.

It provides Class A ground fault protection with a 5mA trip threshold. This is designed for personnel safety to meet NEC requirements for receptacles in wet or damp locations like bathrooms, kitchens, and outdoor spaces.

Yes. Following ABB's acquisition of GE Industrial Solutions, the PowerMark Gold line was migrated to the ABB ReliaHome brand. This full-size 1-inch THQL breaker is fully compatible with older GE PowerMark Gold, GE Q-Line, and modern ABB ReliaHome load centers.

No. THQL series breakers require a full 1-inch space per pole. They cannot be installed in the half-inch spaces specifically reserved for GE THQP compact breakers.

This model utilizes a pigtail neutral connection. The attached coiled white wire must be routed and torqued to the neutral bus bar in the panel to provide the necessary reference for the internal ground fault sensing circuitry.

Yes, the box lugs are rated for both copper (14-8 AWG) and aluminum (12-8 AWG) wire. When terminating aluminum conductors, always use an approved anti-oxidant joint compound to prevent corrosion and ensure a reliable connection.

The LIG designation indicates three types of protection: Long-Time (thermal response for continuous overloads), Instantaneous (magnetic response for short circuits), and Ground-Fault (current leakage detection).