DIYbanter - View Single Post

wrote:

Personally I like the dedicated equipment grounding conductor, but
then I have to remind myself, BX(AC) has a dedicated equipment
grounding conductor, and unlike romex(NM) it also shields the
conductors from accidental abuse.

BX isn't AC. BX doesn't have the grounding conductor, which means it
acts like an inductor when the cladding is used as a conductor. This is
why the bare grounding conductor was added, and the name changed to AC.

This has been discussed here many times.