This international standard applies to cable reels provided with a non-detachable flexible cable with a rated operating voltage not exceeding 690 V a.c./d.c. and 500 Hz with a rated current not exceeding 63 A, primarily intended for industrial use, either indoors or outdoors, for use with accessories complying with IEC 60309-1 or IEC 60309-2. This standard applies to: - portable cable reels equipped with one plug or appliance-inlet and at least one socket-outlet, each complying with IEC 60309-1 or IEC 60309-2; - fixed cable reels equipped with at least one socket-outlet complying with IEC 60309-1 or IEC 60309-2; - cable reels suitable for use at ambient temperature normally within the range of -25°C to 40°C. This standard also applies to cable reels intended to be used in extra-low voltage installations. The use of this equipment on construction sites and for agricultural, commercial and domestic appliances are not precluded. In locations where special conditions prevail, for example, on board ships, vehicles and the like, or where explosions are liable to occur, additional requirements may be necessary.