Tsolanto,

Your inspector must like to make things up. There is no requirement that I know of to use "listed" or "listed for the purpose" supporting devices for NM, MC, or AC.

This actually forced me to walk out to my truck and look at 3 sizes of NM staples from 2 differant manufacturers, none of them have a listing mark on the box. I also checked 2 boxes of EMT straps, they're not listed either.

Evidently I would be in serious trouble with the inspectors in your area. [Linked Image]

Few things are harder to put up with than the annoyance of a good example.