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Can you use flex in a class 1 div 1 area

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Bedspring

New User
Location
Edmonton
Occupation
Electrician
If it's hard usage rated and sealed at both ends, can I run flex from a jb in a div 2 location to a explosion proof fitting in div 1. This will be sealed at both ends
From the fitting two more flex come out and attach to two explosion proof gas heater boxes. These should be sealed on both ends as well?

Seems hard to find div 1 rated flex connectors, I've looked through the code book but can't find a solid answer
 
don_resqcapt19

don_resqcapt19

Moderator
Staff member
Location
Illinois
Occupation
retired electrician
The flexible fitting that is provided for in 501.10(A)(2)(1) is also know as a flexible coupling. That is the only flexible raceway permitted to be used in the Class I, Division 1 location.
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This is a very expensive product with the 1/2" size costing around $100 per foot.

Sorry, I just noticed this is in the Canadian Electrical Forum, and my answer is an NEC answer. In many cases the rules between the CEC and the NEC are very close to being the same, but I don't know if that is the case here.
 
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