End feed 3 phase is the electrical connection piece to connect your track to 230Volt.
This can be placed at the beginning or the end of the trace.
Note, if you are making a trace with 1 or more corner pieces, that the earth is on the right side of the accessory, the earth conductor is in the rail on the right, then order all accessories with the earth on the right or left.
With a straight trace you can apply either soil to the right or left
Grounding: left or right
Colors white or black
3 phase means: 3 x 230Volt, you can switch your lighting in 3 groups