LED track lamp chamfer on three lamp holder should leave some power cords.
Topic is not very understand Is too general General power line 5, and 3 wire ground zero line 1
LED track light need to cooperate to use guide bar, track light generally have lines to 2/3/4 line. If it is two lines, the track light only two copper joint, lighting when two copper article just touch guide groove. Wire of power supply is connected and zero line, make lamps and lanterns. If 3 line is actually there is a ground wire.
Topic is not very understand, LED on the guide rail? Four wire guide? Four wire guide actually contains five lines: three wire, a zero, a ground wire, three wire to form a loop, respectively, can be three switch control circuit, respectively, with guide rail the four gear on the lamp holder, so you can achieve a guide jacket three lights, according to the needs, according to the different switch, different lights.
