MIC is the Minimum Igniting Current. This is the ratio of the minimum current required from an inductive spark discharge to IGNITE the most easily ignitable mixture of a gas or vapor, divided by the minimum current required from an inductive spark discharge to ignite methane under the same test conditions.

In the “Class/Division/Group” system of HAZARDOUS area classifications, MIC RATIOS are used for GROUPS B, C, and D to define the types of hazardous gases in the surrounding atmosphere.

MIC is the Minimum Igniting Current. This is the ratio of the minimum current required from an inductive spark discharge to ignite the most easily ignitable mixture of a gas or vapor, divided by the minimum current required from an inductive spark discharge to ignite methane under the same test conditions.

In the “Class/Division/Group” system of hazardous area classifications, MIC ratios are used for Groups B, C, and D to define the types of hazardous gases in the surrounding atmosphere.