HEY Joe!
I have seen that BX to which you are reffering to... Many times!
If I remember correct my X G/F's apartment building was full of it... It was a steel armour cable with cloth covered rubber with a tin plated copper conductor and it might of had a bonding "strip" inside.. I guess at that time it wasnt bad BUT I noticed it started to break down, the rubber is literally drying out, cracking and falling off so changing out fixtures or devices gets really tricky... I guess the building to have been built in the mid to late 50's or early 60's because I also found Romex in some of the walls that contained grounds BUT there were ungrounded 2-pronger outlets installed, as well as all sorts of odditiesthroughout the building from that time period.
A.D
