This part of the IEC 60917 series applies to a frame-based cabinet structure with the
specification of interface dimensions for the installation of miscellaneous equipment. The
frame structure provides the mounting planes with mounting points for the assembly of
internal and external accessories. Unlike the existing standards IEC 60917-2-1 and
IEC 60297-3-100, this standard allows cover parts like top covers and front/rear doors to
exceed the cabinet's external coordination dimensions.