I provided a link to the Wiki entry regarding Paschen's Law.
What more "rationale" is needed? When physical laws say something can't exist ... it can't exist.
Clearly the problem is the non-existent "rationale" behind the NEC requirements. For the very first time, UL is listing a product that they simply can NOT test for the promised function.
That is, the units are NEVER asked to detect any sort of arc-let alone interrupt one. They might was well call them "Pixie dust detectors."
New Hampshire is correct. The NEC lobby is wrong on this one. New Hampshire has to answer to it's citizens. The NFPA answers to no one -not even its' members. Nor, for that matter, does UL.
It's time to reign in these self-appointed kings.
