On Apr 1, 6:31*pm, "RBM" wrote:
"Mikepier" wrote in message

...

** MC cable has an additional copper ground conductor-

Yes, that is known as MC lite with the aluminum clad . But the old BX
relied on the steel clad for a ground.

** and the new BX (AC) lite relies on it's aluminum shield for it's ground.

Then why do they put a seperate green ground conductor in the aluminum
MC cable where conventional BX did not have a seperate ground?
These days if you go to Lowes or HD, all they have is MC Lite 12/2
with a ground. I think HD still has the "classic" 12/2 steel BX on
the shelf with no seperate ground.