2014-03-05 · Minimum Ignition Current (Ratio) M inimum I gnition C urrent ratio. The minimum current required from an inductive spark discharge to ignite the MOST EASILY IGNITABLE MIXTURE of a GAS, MIST or DUST in air …..relative to that which is required to ignite a METHANE-AIR mixture . (Under the same test conditions) Reference from IEC

1980