Applies to all low-voltage power circuit breakers and AC power circuit protectors as covered in American National Standard for Low-Voltage AC Power Circuit Breakers Used In Enclosures, ANSI/IEEE C37.13-1990, American National Standard for Low-Voltage DC Power Circuit Breakers Used in Enclosures, ANSI/IEEE C37.14-1993, American National Standard for Trip Devices for AC and General Purpose DC Low-Voltage Power Circuit Breakers, ANSI C37.17-1979 (R1988), American National Standard Requirements for Enclosed Field Discharge Circuit Breakers for Rotating Electric Machinery, ANSI/IEEE C37.18-1979 (R1991), American National Standard for Low-Voltage AC Power Circuit Protectors Used in Enclosures, ANSI/IEEE C37.29-1981 (R1990), American National Standard for Switchgear - Low-Voltage AC Power Circuit Breakers Used in Enclosures - Test Procedures, ANSI C37.50-1989 (R1995), and American National Standard Test Procedures for Low-Voltage AC Power Circuit Protectors Used in Enclosures, ANSI C37.52-1974 (R1995).