Hubbell Incorporated GFBF20BK GFCI Receptacle 20 A 125 V AC Black Nylon Back Wire

20 A GFCI Receptacle for Commercial Use

The Hubbell GFBF20BK is a 20 A, 125 V AC ground-fault circuit interrupter built for general-use commercial installations. Its black nylon housing carries a NEMA 6 enclosure rating and meets NEC requirements with CSA certification and UL listing. Automatic reset and integral self-testing provide ongoing protection without manual intervention. The device includes mounting hardware for flush-mount applications.

Verify Wiring Method and Circuit Compatibility

Confirm that the existing box accepts back-wiring with screw terminals and that the circuit is rated for 20 A at 125 V AC. The receptacle uses a 2-pole, 3-wire configuration and requires a flush-mount opening with 3.27 in centre-to-centre mounting holes. Ensure the branch circuit and breaker match the 20 A rating and that local codes permit general-use GFCI devices in the intended location.

Mounting Hardware and Self-Test Simplify

Supplied mounting hardware eliminates the need for separate screws or brackets during flush-mount installation. The automatic reset function restores power after a fault clears, while the built-in self-test continuously monitors protection integrity without user action. These features reduce commissioning time and ongoing maintenance compared with non-self-testing units that require periodic manual checks.