Technically, Flexible Metal Conduit Assembly, Liquid-tight (DXAS) is a "fitting" and falls under 501.10(B)(3)(1) since it comes with the connectors preassembled. Note the UL Guide Information permits, but does not require, it to be ?liquid-tight.? It is analogous to Division 1 flexible fittings described in Conduit Fittings for Use in Hazardous Locations (EBNV)
?Common? Flexible Metal Conduit, Liquid-tight (DXHR) falls under 501.10(B)(3)(3) and ?Common? Flexible Metal Conduit (DWWY) falls under 501.10(B)(3)(2).
In the latter two cases, it is the appropriate installation with listed connecters that make the total assembly suitable for Division 2. Don is correct that neither of them are required to be listed for Division 2. In fact, for a long time Flexible Metal Conduit wasn?t required to be listed at all ? even in Division 2 applications.