System of three separated circuits tracks and accessories for power supply and for development of different spatial configurations. On the inside, there are four copper conductors (three phases L1, L2, L3 and neutral N), each isolated from the body of track by a PVC profile. The maximum voltage between each phase and neutral is 250V. The maximum current for all the three circuits (L1+L2+L3) is 16A. The maximum power considered at the nominal entry voltage is 3,7 kW. System of tracks for DALI projectors, with three power circuits and a separate circuit for DALI control. All the main electrical characteristics are identical to those of the three-circuit tracks. Power supply and connection accessories are available for the construction of various structures. The accessories of the three circuits track system can be used for fixing and suspension.