Requirements are applicable to mobile or transportable units.For the purpose of this standard, the term 'unit' is intended to mean a vehicle and/or mobile or transportable structure in which all or part of an electrical installation is contained.Units are :- either of the mobile type, e.g. vehicles (self-propelled or towed);- or of the transportable type,e.g. containers or cabins placed on a base frame.Examples of the intended use are for broadcasting, medical services, advertising, fire fighting, workshops, etc.Two or more units may be electrically connected together.The requirements are not applicable to :- generating sets- marinas and pleasure craft- mobile machinery in accordance with IEC 60204-1- caravans- traction equipment of electric vehiclesWhere applicable, additional requirements as laid down in clauses of Part 7 shall be taken into consideration, e.g. for showers, medical locations, etc