Support system intended to be employed in an electrical cabinet which comprises a framework comprising a bottom base, vertical uprights and a top base, arranged to form four pairwise parallel lateral faces (12a, 12b, 12c, 12d), said system comprising a support forming a bearing surface and a functional element intended to cooperate with said support, - the support comprising a first series of two crossmembers comprising a first crossmember and a second crossmember that are parallel to one another and a second series of two crossmembers comprising a first crossmember and a second crossmember that are parallel to one another, - the first crossmember and the second crossmember of the first series each comprising a first elongate sectional bar along a first longitudinal axis which comprises a transverse section of a first profile and two ends, - the first crossmember and the second crossmember of the second series each comprising a second elongate sectional bar along a second longitudinal axis which comprises a transverse section of a second profile and two ends, - the first crossmember and the second crossmember of the first series being intended to be fixed between two vertical uprights of the framework along two first parallel faces, the first crossmember and the second crossmember of the second series being intended to be fixed between two vertical uprights along two other parallel faces of said framework, characterized in that: - at each end, the first crossmember and the second crossmember of the first series comprise a fixing lug, to be fixed onto the vertical upright of said framework, - at each end, the first crossmember and the second crossmember of the second series comprise two fixing lugs, to be fixed onto the vertical upright of the framework, and a cutout arranged between said two fixing lugs, - said first series of crossmembers and said second series of crossmembers cooperate with one another to form a support frame defining said bearing surface, - at each end, the first crossmember and the second crossmember of the second series cooperate with the first crossmember or the second crossmember of the first series so that said cutout is configured to circumvent said first profile and so that said two fixing lugs are arranged on either side of said first sectional bar. - the support comprising a first series of two crossmembers comprising a first crossmember and a second crossmember that are parallel to one another and a second series of two crossmembers comprising a first crossmember and a second crossmember that are parallel to one another, - the first crossmember and the second crossmember of the first series each comprising a first elongate sectional bar along a first longitudinal axis which comprises a transverse section of a first profile and two ends, - the first crossmember and the second crossmember of the second series each comprising a second elongate sectional bar along a second longitudinal axis which comprises a transverse section of a second profile and two ends, - the first crossmember and the second crossmember of the first series being intended to be fixed between two vertical uprights of the framework along two first parallel faces, the first crossmember and the second crossmember of the second series being intended to be fixed between two vertical uprights along two other parallel faces of said framework, - at each end, the first crossmember and the second crossmember of the first series comprise a fixing lug, to be fixed onto the vertical upright of said framework, - at each end, the first crossmember and the second crossmember of the second series comprise two fixing lugs, to be fixed onto the vertical upright of the framework, and a cutout arranged between said two fixing lugs, - said first series of crossmembers and said second series of crossmembers cooperate with one another to form a support frame defining said bearing surface, - at each end, the first crossmember and the second crossmember of the second series cooperate with the first crossmember or the second crossmember of the first series so that said cutout is configured to circumvent said first profile and so that said two fixing lugs are arranged on either side of said first sectional bar.