From the '08 NEC, I've gleaned that the wiring cleat sockets use is only permitted in "industrial or agricultural establishments". [398.10]
The cleat sockets themselves are mentioned again in [410.5], to be installed 8ft or higher from the floor, but no reference to [398.10] is made.
If I were attempting a "mock historical" installation in a resi. setting, what would I do??