Best of luck to them. Maybe knob and tube will make a comeback? As far as NM becoming more hazardous above a certain number of stories, "magically," here's my smart a** retort in kind. Its not about stories, its about construction durability and longevity. They set precedents and convolute codes with this kind of change. If we are going to allow NM, allow it. Don't drag another NFPA document into the mess and ask me to spend more time in plan reviews that I don't get enough time to review to begin with. They couldn't use UBC construction types, had to have their own. It never ends. And then they hope to entice other countries to follow our lead and buy our convoluted abortion. The original question here was about "problems" and "hazards" we see. Its all a matter of degree I suppose. My thinking is that allowing any extended useage of NM in commercial and industrial applications will result in increased problems and hazards, which I'm in the business of avoiding. Rope it! I'll pipe it, then we can compare stories in 50 years.
