One important thing to understand about the new UL 943 "End of Life" provision is that the device need only indicate when it is no longer functioning and not necessarily deny power to the unit.
It appears several manufacturers’ will indeed produce devices that will not operate if mis-wired or upon loss of ground fault sensing function, but not all will. The new provision only requires and audible or visual indicator to activate upon loss of the gfci function OR the unit must disable itself from supplying power.
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Bryan P. Holland, MCP