There has always been debating regarding that. IMHO, I'd say the grounding
of a copper wire is better than the sheath of rusty steel, but on the other
hand, the steel affords better physical protection. The insulating
properties of the wire inside is more important and any new cable nm or ac
(romex or bx) would be better than an old cable
"blueman" wrote in message
...
We have some BX runs laid out in a "star" (or spoke-and-hub)
configuration in our basement.

The electrician suggested replacing the old BX with Romex since he
said that the BX relies on the cladding for grounding which can rust
leaving the circuits ungrounded.

Is this a real concern with BX?
Is Romex better than old BX or does the metal cladding give you a
better quality cable?