1.1 This standard specification relates to low-voltage and medium-voltage semi-enclosed fuses, having ratings of 250 volts maximum to earth, and 200 amperes or less, intended for any of the categories of duty, both a.c. at 50 cycles per second and d.c, included in table 1, and for use under service conditions not more onerous than those described in clause 2.
NZSS 1951-1965 history
1965NZSS 1951-1965 SEMI-ENCLOSED ELECTRIC FUSES RATINGS UP TO 200 AMPERES AND 250 VOLTS TO EARTH