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NOTE: This is an unformatted excerpt from our online fire protection training library.

Identifying Materials & Equipment

Zone Groups

Group IIB is almost the same as Group C, but the dividing values of MESG and MIC ratio are somewhat different. For Group IIB, the range of values of MESG are 0.50 mm to 0.90 mm compared to 0.45 mm to 0.75 mm for Group C. The range of values for the MIC ratio for Group IIB are 0.45 to 0.80 compared to 0.40 to 0.80 for Group C.
NOTE: This is an unformatted excerpt from our online fire protection training library.

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