Electrical connection bus

A connecting bus includes an electrically conductive bar comprising two electrical connector assemblies. At least one of the two electrical connector assemblies includes a female connector having at least one electrically conductive spring tongue. For each of the electrical connection assemblies included in the connecting bus, the electrically conductive bar includes a corresponding non-isolated zone surrounding the electrical connection assembly. The electrically conductive bar further includes an outside electrically insulating layer surrounding the whole electrically conductive bar apart from the non-isolated zone.