QO250GFI use case: Square D QO250GFI gives a 50-amp two-pole circuit Class A ground-fault protection through a QO plug-in breaker with a neutral pigtail. It is suited only to equipment that lists this QO GFCI construction.
QO250GFI specifications
-
Model: QO250GFI
-
Current: 50A
-
Poles and voltage: 2-pole, 120/240VAC
-
Interrupting capacity: 10kA
-
Ground-fault sensitivity: 6mA Class A
-
Neutral: Factory pigtail
Function and neutral style
This is GFCI plus thermal-magnetic overcurrent protection, not AFCI. The pigtail arrangement is also different from a QO plug-on-neutral catalog number, even when the face and amperage appear close.
Confirm the full circuit
Review the panel label, conductor type and size, neutral routing, load rating, terminal torque, and available fault current before ordering. The installed unit must be tested using the manufacturer's procedure. Selection and installation should be performed by a qualified person.