Question 9012 of 871 · Maryland Journeyperson Electrician Exam
What is the minimum thickness of sealing compound in a completed conduit seal in a Class I location?
Exactly one answer is correct.
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Correct answer to question 9012
- B: Not less than the trade size of the fitting and never less than 5/8 in
Explanation
The completed seal must have a compound thickness at least equal to the trade size of the sealing fitting and in no case less than 5/8 in. This depth is needed so the seal can stop flame and gas passage.
More questions: Special Occupancies
- 9013Unless the sealing fitting is identified for a higher fill, the conductors in a Class I seal may occupy no more than what percentage of the cross-sectional area of rigid metal conduit of the same trade size?
- 9014A rigid metal conduit run leaves a Class I, Division 1 location and enters an unclassified area. Within what distance of the boundary must the boundary seal be installed?
- 9015Threaded rigid metal conduit in a Class I, Division 1 location must be made up wrenchtight with at least how many fully engaged threads?
- 9016Which wiring method is generally permitted in a Class I, Division 1 location?
- 9017Flexibility is needed at a motor terminal box in a Class I, Division 1 location. Which method is acceptable?
- 9018Enclosures for equipment in a Class II, Division 1 location must generally be of what type?