__ merac-A___    hl. skrina
     /             \_______________
    |               | ~hl.-istic-A |--------------> Rozv. skrina (byt A)
    |               |  \______     |
distributor         |   ______A/B--|--> napajanie spol. priestorov
    |               |  /           |
    |               | ~hl.-istic-B |               
    |               |______________|--------------> Rozv. skrina (byt B)
    \___ merac-B____/

                              A/B = prepinaci kontaktor