System of three separated circuits tracks and accessories for power supply and for development of different spatial configurations, with recessed mounting in plasterboard suspended ceiling. 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 tree circuits (L1+L2+L3) is 16A. The maximum power, considered at the nominal entry voltage, is 3,7 kW.