Question 9002 of 749 · Maryland Journeyperson Electrician Exam
A location is hazardous because of the presence of combustible dust. Which class applies under the class and division system?
Exactly one answer is correct.
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Correct answer to question 9002
- D: Class II
Explanation
Combustible dust creates a Class II location. Class I is for gases and vapors, Class III for fibers and flyings. Zone 2 belongs to the zone system for gases and vapors under Article 505.
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