[HARRY304E]

We're doing a lighting replacement project and am wondering if we have add a egc to the AC cable coming through the ceilings. It is stranded THHN inside a steel armored casing no bonding strip and is a heavy durable steel. Can someone confirm that BX has the old rubber and cloth insulation on the cable and AC has the tiny bonding strip ran through it?

That is just flex, not BX, so you need to run a ground wire.

 

[HARRY304E]

What the OP is describing may be "code worthy" in lengths under 6' but from my personal experience (seeing fires caused by BX cable) I wouldn't trust it.

I do not believe it is a reliable return path for fault current due to the seemingly high impedance.

Pete

I like the way it glows...:laughing: