I was just in a basement last week that had an old piece of BX close to touching the gas pipes, the BX wasn't grounded, and somewhere in its length the hot had come in contact with the armor. WELL, let me tell ya, touched the armor and the sparks flew! The cable touched the pipe, grounded out, opened the OCPD. Point is, this installation was put in a LONG time ago, and at the time, there might not have been any reason to think there was going to be a short against the gas pipes. How do you determine if it will never be energized?
