DIN EN 60570 VDE 0711-300:2018-12

This International Standard applies to a track systems with two or more poles for the connection of luminaires to the electrical supply consisting of, either
- a system with a rated voltage not exceeding 440 V between poles (live conductors) with provision for earthing (class I) and a rated current not exceeding 16 A per conductor, or
- a SELV system with a rated voltage not exceeding 25 V a.c. or 60 V d.c. without provision for earthing (class III) and a rated current not exceeding 25 A per conductor, or
- a combination of the two systems mentioned above (mixed supply system) for the connection of both mains voltage luminaires (class I or II) and SELV supplied luminaires (class III) simultaneously, but in different sector openings (mains or SELV).
The track systems may also provide for the mechanical support of the luminaires.