Here is the situation. At my church we want to run mike cables below the floor in order to eliminate the current tripping hazard of the cables running across an isle. The floor is concrete on metal deck and the holes are already drilled. The cables would drop down through the floor, rest on top of the suspended acoustical ceiling, and pop up through the floor again. Do we need plenum rated microphone cables or can we just string the regular mike cables that we have now? We are also considering running a snake instead of individual cables. The snake might add some additional flexibility without having to get into the ceiling of the basement classrooms below. Does the snake have to be plenum rated if we go that route? Thanks!