"This Standard applies to Class A@ single- and three-phase@ ground-fault circuit-interrupters intended for protection of personnel@ for use only in grounded neutral systems in accordance with the National Electrical Code (NEC)@ ANSI/NFPA 70@ the Canadian Electrical Code@ C22.1 (CEC)@ and Electrical Installations (Use)@ NOM-001-SEDE. These devices are intended for use on alternating current (AC) circuits of 120 V@ 208Y/120 V@ 120/240 V@ 127 V@ or 220Y/127 V@ 60 Hz circuits. Note: In Canada@ the text ""intended for protection of personnel"" is excluded. These requirements do not cover ground-fault circuit-interrupters intended for use in circuits served by a transformer having windings wholly insulated from each other. This Standard applies to all Class A ground-fault circuit-interrupters. These Class A GFCIs are permitted to be integrated into other devices@ in which case@ besides complying with this Standard@ these devices are to comply with the corresponding applicable Standard for the device in question. This Standard includes minimum requirements for the function@ construction@ performance@ and markings of ground-fault circuit-interrupters included in the scope. This Standard is intended to cover only Class A GFCI devices. "