Rack of a switchgear cabinet or rack with a current supply unit

having rack of a cabinet or rack with a frame profiles (10) and a power supply unit (20), the busbars accommodated in a plurality of an insulating profile (22) (21) characterized, that the longitudinally of the insulating profile (22) extending bus bars (21) are almost completely embedded in the insulating profile (22) and introduced to the longitudinal side in the insulation hole-shaped contacting openings (23) are finger-safe accessible and forms or in that the insulating profile (22) is inserted into a receiving chamber (11), the integral one, integral part of a frame profile (10) connected in one with the frame profile (10) separate profile is trained and directed a with respect to the frame structure inwardly opening side has.