- Reaction score
- 17,090
The new reg is for CUs constructed from noncombustible materials, just so happens that metal is noncombustible, or in a noncombustible enclosure.When the new reg for metal CU’s came in, Certsure web in air vid, with that Darren Standforth what’s his name, said the idea behind the change was to remove a source of fuel (i.e. the plastic enclosure) from a fire. Then they changed the reasoning to containing a fire.
From that op pic, think the former was better reasoning, if at all.