I am working on a large industrial job site that will manufacture ethanol. This auestion has come up several times. Is non-UL listed seal-tite legal to use in a class 2 div 2 location?:-?
Various forms of liquidtight conduit (metal and nonmetallic) are required to be listed by their respective Articles. (350 and 356) There are no special marking requirements for Classified location applications if they are otherwise installed per Arts 500-516. See 500.10(B)(2)(3) for example.
The fittings must be listed as indicated in the example; however, no special marking is required.
The manufacturer may indicate that the material is acceptable in Classified locations, but it is not a requirement.