Hello, I live in Las Vegas. Clark County code requires wiring in many commercial places to be installed in metalic raceways (Type I or II A Construction). If a 70v distributed sound system wiring for ceiling speakers is put in conduit, does the conduit have to be bonded? NEC states that circuits 50v or more need to be bonded. Most 70v amplifiers employ class 2 wiring which in most cities, doesn't need to be in conduit. But in Vegas, due to the location of the wiring, sometimes needs to be in metalic conduit. So in short, if I decide to run 70v systems and class 2 and 3 speaker wire circuits in metalic conduit, dos the conduit have to be bonded?