by mousepotato »
Sun Sep 10, 2017 4:24 pm
For anyone still puzzled (like me) it becomes clear if you look at the instructions for the individual spots etc. that you can connect to the rail. Each spot has a switch to select between being powered by phase 1-2-3. This way you can have separate wall switches for each phase, and switch different lights on and off independently.
If you only have single phase power, you just wire up one phase in the rail, and switch your spots to use that phase.
3-phase power allows you to have more lighting elements per rail system, and have independent switching.