Which standards should be followed for the installation of protection devices against overloads and short circuits? ABNT NBR NM 60898 or IEC 61009...

The correct answer is option "c) I, II, and III are correct." For the installation of protection devices against overloads and short circuits, it is necessary to follow the standards established by ABNT (Brazilian Association of Technical Standards) and IEC (International Electrotechnical Commission). For circuit breakers, the standard to be followed is ABNT NBR NM 60898 or IEC 61009-2.1. For gG type fuses, the standards are ABNT NBR IEC 60269-1 and ABNT NBR IEC 60269-2 or ABNT NBR IEC 60269-3 for fuse devices. For circuit breakers associated with fuse devices, the standards to be followed are ABNT NBR IEC 60947-2 or ABNT NBR NM 60898.