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Will a QO or Homeline GFI, AFI, CAFI, or DF circuit breaker be fully operational in a panelboard or load center that does not have a neutral bar?

Issue:
Does the correct operation of a GFI breaker require a line neutral?

Product Line:
QO, QOB, and Homeline breakers

Environment:
Miniature Circuit Breakers

Cause:
Installation/Wiring

Resolution: 
No, QO and Homeline electronic circuit breakers will not be fully functional in a panel without a neutral.

Whether GFI, AFI, CAFI, or Dual Function, QO and Homeline electronic circuit breakers require a 120V source for their push to trip/test feature to operate correctly. This means a neutral must be present in the system AND must be tied to the breaker through the white pigtail wire or plug-in neutral connection. This is required EVEN IF there is no neutral present in the load. 

For more information on how the electronics in a GFI breaker work, see FA115047
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