Question 9011 of 871 · Maryland Journeyperson Electrician Exam
In a Class I, Division 1 location, a conduit seal required at an explosionproof enclosure containing arcing devices must be located no more than how far from the enclosure?
Exactly one answer is correct.
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Correct answer to question 9011
- A: 18 in
Explanation
Conduit seals for enclosures containing switches, circuit breakers, or other ignition sources must be installed within 18 in of the enclosure, or as required by the enclosure marking. Only listed fittings such as explosionproof unions and conduit bodies may sit between the seal and the enclosure.
More questions: Special Occupancies
- 9012What is the minimum thickness of sealing compound in a completed conduit seal in a Class I location?
- 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?