Part 3 of EN 50264 specifies requirements for, and constructions and dimensions of, multicore cables of the following types and voltage ratings: - 300 V/500 V Screened or unscreened (1 mm2, 1,5 mm2 and 2,5 mm2, number of cores from 2 to 40) - 0,6 kV/1 kV Screened or unscreened, (1 mm2 to 50 mm2, 2, 3 and 4 core) All cables have class 5 tin coated annealed copper conductors to HD 383, halogen-free insulation and halogen-free sheath. They are for use in railway rolling stock as fixed wiring, or wiring where limited flexing in operation is encountered. The requirements provide for a continuous conductor temperature not exceeding 90° C and a maximum temperature for short circuit conditions of 200° C based on a duration of 5 seconds. Under fire conditions the cables exhibit special performance characteristics in respect of maximum permissible flame propagation (flame spread) and maximum permissible emission of smoke and toxic gases. These requirements are specified to permit the cables to satisfy Hazard Levels 2, 3 or 4 of EN 45545-1. Part 3 of EN 50264 should be used in conjunction with Part 1, General requirements.