This part of IEC 62683-2 series specifies the building information modelling (BIM) with the physical characteristics and technical services of low-voltage switchgear and controlgear assemblies to be used mainly for the construction phase of the building and also for delivering data for operation. This document intends to cover all types of assemblies covered by IEC 61439 series which can be installed in a building. Busbar trunking systems defined by IEC 61439-6 are under consideration for a next edition. These BIM object models, registered in IEC CDD, are intended to supply the process defined by ISO 16739 series. This document does not cover: the build-in components included within the assembly such as switchgear and controlgear, safety related control system of machinery, the detailed electrical and mechanical configuration of the assembly logistic information.