Profile: Prysmian Cables & Systems Limited offers low smoke, zero halogen and flame retardant cables. 6491B Low smoke cable is a fundamental, single core, low smoke cable for installation in a wide range of internal general wiring and building applications. Suitable for new-build and refurbishment projects, with its small size and 90°C rating, 6491B is the ideal choice for wiring containment or conduit systems for general building services. Using 6491B cable in this way enables straightforward modification to both lighting and power circuits within buildings in particular hospitals and offices which frequently need layout changes and they need to happen quickly, out of hours, with maximum performance but minimum fuss.