NM CID ES-1 Practice Questions - New Mexico CID ES-1 Electrical Signs And Outline Lighting Examination Exam

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In a major repair garage where flammable fuels may be present and the required ventilation is not provided, NEC 511.3 classifies the floor area as Class I, Division 2 up to what height?

6 inches above the floor 18 inches above the floor 4 feet above the floor The entire building height

Correct Answer:

18 inches above the floor

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