The installation must comply with the essential requirements of the Directive but does not need CE marking or a declaration of conformity

The directive does not distinguish between different kinds of installation, but in order to investigate which provisions of the Directive can be declared not-applicable without challenging the objective of the Directive we can separate the following two cases :

Case 1 : Fixed Installations

In the case of fixed installations it is possible to use parts not intended to be placed on the market as a single commercial unit and it makes no difference whether they were placed on the market by the same or different manufacturers because none of these manufacturers is sure to know the final electromagnetic effect the combination of each single part in the installation will have; they can only assume the responsibility of each single part when placing it on the market. The ultimately responsible person(s) for the design, engineering and construction (assembly and erection) becomes the manufacturer in the sense of the Directive and assumes the responsibility for the installation's compliance with all applicable provisions of the Directive when taken into service.

The EMC assembly instructions given by the manufacturer(s) and the whole method of installation has to be in accordance with good engineering practice within the context of installation rules that must be fully compatible with the EMC Directive.

Such an installation does not need a CE marking or a declaration of conformity or involve a competent body.

Case 2 : Moveable Installations

If the installation is intended to be moved to and operated in a range of locations which may cause changes in the electromagnetic environment. Such a movable installation has to be in compliance with the Directive like a system.

If such installations are, however, intended to substitute or to extend a fixed installation they have to be treated in the the same way as a fixed installation