I'd be surprised if it precluded the use of low voltage wiring because there are standards for it as well. The issue is that the law ends up with houses needin

I'd be surprised if it precluded the use of low voltage wiring because there are standards for it as well. The issue is that the law ends up with houses needing the 120VAC connection to the grid. I don't think that doesn't mean there can't be a secondary low voltage line, but ianal.