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Ground-Fault Circuit-Interrupter

A device intended for the protection of personnel that
functions to de-energize a circuit or portion thereof within
an established period of time when a ground-fault current
exceeds the values established for a Class A device.
Informational Note: Class A ground-fault circuit-interrupters
trip when the ground-fault current is 6 mA or higher
and do not trip when the ground-fault current is less than
4 mA. For further information, see UL 943, Standard for
Ground-Fault Circuit-Interrupters.