10+ Years ago we used sonance 14/4 speaker cable to the first speaker then a piece of brown 16/2 lamp cord or 'zip cord' over to the second speaker for in-wall, in-ceiling speaker runs.

At AVS someone said this goes against code. Does it go against code? If so does anyone know why?

I'm not planning on using it just curious. First thing i though of was maybe its because it could be confused as high voltage but i really have no idea.

Thanks.