... in chambers, tunnels and ductsKVVPCopper conductor PVC insulated PVC sheathed braided screen control cablesFixed installations in chambers, tunnels and ducts where ... be flexible and demand screeningKVVRPCopper conductor PVC insulated PVC sheathed braided screened flexible control cablesMoveable installations in chambers where cables should ... 2,3,4,5,7,8,10,12,14,49,24,27,30,37,44,48,52 and 61.