Preface
This is the harmonized ANCE, CSA Group, and UL Standard for Ground-Fault Circuit-Interrupters. It is the third edition of NMX-J-520-ANCE, the second edition of CSA C22.2 No. 144.1, and the fifth edition of UL 943. This edition of NMX-J-520-ANCE supersedes the previous edition published on February 1, 2006. This edition of CSA C22.2 No. 144.1 supersedes the previous edition published in February 2006. This edition of UL 943 supersedes the previous edition published on February 1, 2006, and revised on June 29, 2012.
Scope
1.1
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, Part I, 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.
1.2
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.
1.3
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.
1.4
This Standard includes minimum requirements for the function, construction, performance, and markings of ground-fault circuit-interrupters included in the scope.
1.5
This Standard is intended to cover only Class A GFCI devices.
1.6
This Standard also covers GFCIs of the self contained type that are intended for installation in a counter, such as would be suitable for installation in a kitchen or bathroom counter top.
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CAN/CSA-C22.2 NO. 144.1-06 (R2015) - Ground-Fault Circuit-Interrupters (Tri-National standard, with UL 943 and NMX-J-520-ANCE)
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