Greg the point of this new MC is that the armor will be a reliable ground path.
I found the article I read about this.
Here are couple of key parts.
The size of the bare aluminum grounding/bonding conductor is based on NEC Table 250.122. Cables with 12 AWG copper current-carrying conductors are constructed with a 10 AWG bare aluminum grounding/bonding conductor. Cables with larger current-carrying conductors have appropriately larger sized bare aluminum grounding/bonding conductors.
Most important was clarification that the new cable had been tested both with the bare aluminum grounding/bonding conductor simply cut off and also with it folded back over the armor and that these tests had been conducted with many different types of listed fittings.
The entire article which has a ton of info can be read here at the IAEI
http://www.iaei.org/subscriber/magazine/04_c/trainor.htm Bob
[This message has been edited by iwire (edited 05-18-2006).]