Current-carrying capacity of cables for the accumulation on walls, in tubes and conduits, on the floor and at the ceiling VDE 0298-4 06/13 table 21 No. of multi-core cables (2 or 3 current-carrying cores) Factor 1 1,00 2 0,80 3 0,70 4 0,65 5 0,60 6 0,57 7 0,54 8 9