Can I use the existing 10/3 steel armored cable as feeder for a 240v 30 amp subpanel in my garage (detatched)?
That's 3 wires and a grounded metal jacket. 2 hots (red and black) which connect to a double 30a breaker at the main panel, along with a neutral wire(white) which is bonded to the main panel.
I've seen similar things discussed here so I know I'm missing a wire somewhere. The Does not the metal jacket substitute for the lack of a bare ground wire? Suppose I use a ground rod at the subpanel. Any reason not to ground cable at both ends? Does a 30 amp GFI at the main panel mitigate concerns about the missing wire (?) be it green or bare copper? That's a lot of questions so I'll summarize. How can I di this without replacing the 10/3 armored feeder?