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BX

3K views 30 replies 15 participants last post by  btharmy 
#1 ·
What is the official reason for the the little strand (most prob like 16 awg) of al that comes inside the bx with the other conductors?
I've heard people tell me its a supplimentry ground but it seems hard to believe because if the bx isnt a good egc do we really want to rely on a 16 awg for you egc??
 
#13 ·
It holds the antishort bushing inplace. That is all it is for. I have seen them connected as equipment grounds on receptacles and terminated in panels but their purpose is to hold the antishort bushing in place.
LC
 
#24 ·
You meant to say "AC"? People are easily confused when we don't use the proper terminology. ;) MC doesn't have the bonding strip. And yes, they are to be wrapped back or cut flush with the jacket, not to be terminated, because it is not a conductor. It is part of the jacket assembly which allows it to be rated as an equipment grounding conductor. Without it, it is just BX cable. The jacket of which is not rated as an equipment ground.
 
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