1. General requirements

In view of the multiplicity of reference documents, it is extremely important, in the case of a given supply, to properly situate a set, to avoid any dispute, undue demand, or even subsequent litigation.

The specifications to be applied may result from one of the standards cited in alone or in combination.

In addition, the main terms used in this article are defined in standard NF EN 60439-1 and are listed in the sidebar.