NEC (500.15) Hazardous Locations Question and Answers
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Question 1 of 8
1. Question
The combustible dust may be present in which of the following locations?
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Question 2 of 8
2. Question
In Class I Division 2 location the flammable substances are likely to be under normal operating conditions.
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Question 3 of 8
3. Question
Which of the following raceways cannot be used in class I division 1 location?
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Question 4 of 8
4. Question
When a conduit run passing from a Class I , Division 2 location into a unclassified location must have seal located with …………….. Feet of the boundary.
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Refer : NEC 501.15(B)(2)
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Question 5 of 8
5. Question
Dispensing devices for liquefied petroleum gas shall be located not less than …………….. feet from any dispensing device for Class I liquids
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Refer : NEC 514.3(B)(2)
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Question 6 of 8
6. Question
In Class II Division I locations, the enclosures for circuit breakers, motor controllers, fuses shall be ……………..
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Refer : NEC 502.115(B)
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Question 7 of 8
7. Question
In class I division 2 location, unless it is specified the cross sectional area of the conductors permitted in a seal shall not exceed …………. Percentage of a cross sectional area of RMC.
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Refer: NEC 501.15(C)(6)
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Question 8 of 8
8. Question
Tank storage installations inside buildings below grade level are classified as ……………….
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Refer : NEC Table 515.3