Applies to direct current (d.c.) powered mobile equipment. Theequipment is operated while being transported, for example in or ona vehicle but does not form part of the vehicle, and is notdesigned to be installed permanently in a vehicle. The equipmentexperiences general open-air climates according to IEC 60721-2-1.The degree of simulation of this test cycle is low.The contents of the corrigendum of March 1996 have been included in this copy.