Re: Type MC-HL Cable
Is "MC-HL" a UL designation? - YES
I've found one MC-HL cable from General Cable. Is anyone aware of other manufacturers? - YES, Okonite - Type CLX. Canada Wire & Cable does also. Any Type MC with a "continuously corrugated" outer sheath will probably meet the requirements.
Has anyone designed/installed any Cl I Div 1 haz-location systems using this method instead of RMC with sealing fittings?- YES and it works well. It is in common use on offshore drilling platforms.
Robert B. Alexander, P.E.
Answers based on 2014 NEC unless otherwise noted.