Akmaster:
THe MC I described above is not a common item, I have seen it installed on only two (2) jobs over the last 10 years. Both jobs were the same EC, both installs were branch circuits (20 & 30 amp); the 20 amps were MWBCs. He used this type MC as it was encased within/under the slabs, instead of the 'old way' of raceways and THHN/THWN.
The outer jacket was all black as I remember; and the piece I have has NO internal bond conductor, as above.
You may have something specific to Alaska, or a specific industry!
