Bl This standard establishes the dimensions and characteristic electrical magnitudes of reversible bipolar plugs with ground connection intended for use in fixed industrial electrical installations with ground connection and nominal voltage of 220 V. B-2 This standard does not include plugs for home installations., B-3 This standard does not include cards intended to be used in explosive environments or with corrosive gases, nor in on-board installations.
IRAM 2074-1948 history
1948IRAM 2074-1948 Electrical plugs with sockets, double-sided and two-pole for use in industrial fixtures, rated for 220 volts