This test method is for use in determining values of flame propagation distance and smoke optical density for electrical and optical-fibre cables that are to be installed in ducts, plenums, and other spaces used for environmental air without the cables being enclosed in metallic raceways in those spaces. This method also determines values of flame propagation distance and smoke optical density for electrical and optical-fibre cables with combustible jackets or sheathes to determine their acceptability for use in buildings of non-combustible construction.Although this method utilizes the same test apparatus as in CAN/ULC-S102, Standard Methods of Test for Surface Burning Characteristics, it does not determine surface burning characteristics of electrical wiring and cables.This test method does not cover the construction requirements for cablesor their electrical and other performance requirements.