This Standard specifies the performance requirements of cables with specific fire performance characteristics. The Standard only specifies the criteria for categories of fire performance of cables that are in addition to those requirements specified in relevant cable Standards as applicable.The Standard covers cables with specific fire performance characteristics and covers the following classifications:(a) Reduced flame propagation (RFP).(b) Reduced fire hazard (RFH).NOTE: Low fire hazard (LFH) remains under consideration.In each of the above classifications the user may specify whether circuit integrity is required as one of the following additional performance classifications:(i) Cable circuit integrity (CI).(ii) Wiring system circuit integrity (WS).NOTES:1 For purchasing guidelines, see Appendix A.2 Although this Standard specifies cable performance under defined fire conditions, it cannot be assumed that cables would behave in the same manner in a real fire. For example, the propagation of flame along a cable installation is dependent on a number of factors, such as -(a) the volume of combustible material exposed to the fire and to any flame which may be produced by the combustion of the cables;(b) the geometrical configuration of the cables and their relationship to an enclosure;(c) the temperature at which it is possible to ignite the gases emitted from the cables;(d) the quantity of combustible gas released from the cable for a given temperature rise;(e) the volume of air passing through the cable installation; and (f) the construction of the cable, e.g. armoured or unarmoured.