HorneTD wrote:

I have attended fires that were caused by the failure of older "BX"
cable to conduct enough fault current to trip the OCPD prior to ignition.

I made the point of the difference, since people here working on older
houses can encounter the older BX, and we can not see what is really
happening at their end. I'm not expecting to change the lingo of every
electrician in the world.

Thanks for the post with the details.