ABB / General Electric THHQB2120GFEP GFEP Miniature Circuit Breaker
- 20A
- 2 Pole
- Bolt-On
Quantity
ABB / General Electric THHQB2120GFEP - 20A GFEP Miniature Circuit Breaker
New
Quantity
Description
Built to safeguard machinery rather than personnel, this 20-amp breaker features a 30mA ground fault trip threshold. It is ideal for commercial installations requiring dedicated equipment protection, such as industrial heating or specialized motor circuits. Installation is supported in GE A-Series panelboards and ReliaGear lighting panels. The bolt-on mounting style ensures a stable connection in high-vibration environments. This HACR-rated component delivers a 22kAIC interrupting capacity.Specifications
| Brand | ABB / General Electric |
|---|---|
| Series | THHQB |
| Amperage | 20A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 22kA @ 120/240VAC |
| Frame Type | THQB |
|---|---|
| Terminal Type | Box Lugs |
| For Use With | GE A-Series Panelboards, ReliaGear Lighting Panelboards |
| Wire Gauge | 14-8 AWG (Cu), 12-8 AWG (Al) |
| Max Wire | 8 AWG |
| Min Wire | 14 AWG (Cu), 12 AWG (Al) |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LIG |
| Trip Function | Long-Time, Instantaneous, Ground Fault |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Special Classification | GFEP |
|---|---|
| Available Options | Padlock Attachment |
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Common Trip, Quick-Make/Quick-Break, Non-Interchangeable Trip |
Product FAQs
6 answersWhat is the ground fault trip threshold for the THHQB2120GFEP?
This GFEP (Ground Fault Equipment Protection) breaker features a 30mA trip threshold. It is calibrated to protect machinery, such as heat tracing and industrial motors, preventing the nuisance tripping that often occurs with 5mA personnel GFCIs.
Which panelboards accept the THHQB2120GFEP breaker?
This bolt-on breaker is compatible with GE A-Series panelboards and ReliaGear lighting panelboards. It requires a bolted connection to the busbar and cannot be used in standard residential plug-on load centers like PowerMark Gold.
How do I wire the pigtail neutral on this GFEP breaker for a straight 240V load?
For 240V applications without a load neutral, the coiled white pigtail wire must still be connected to the panelboard neutral bus to power the breaker internal ground fault circuitry. The load neutral lug on the breaker is left empty in this configuration.
Can the THHQB2120GFEP be installed on a shared neutral circuit?
No. Ground fault breakers require a dedicated neutral for the protected circuit. Installing this breaker on a shared neutral (multi-wire branch circuit) will result in an immediate trip when a load is applied.
What is the difference between the THQB2120GFEP and the THHQB2120GFEP?
The THHQB version features a higher interrupting capacity of 22kAIC at 240V, making it suitable for commercial systems with higher available fault current. The standard THQB version is rated for 10kAIC. Both share the same physical footprint and bolt-on mounting.
How do I test the ground fault function after installation?
Once installed and energized, press the yellow test button on the face of the breaker. The breaker should immediately trip, moving the handle to the center position. GE recommends performing this test monthly to ensure the equipment protection circuitry is functioning correctly.
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