CABLES AND WIRES - Novkabel

Reduction factorTable: Multi-core cables laid in the air distanced from the wall IEC 60502Method of cable installationNo. of cablesNo. oftrays 1 2 3 4 6 91 1,00 0,88 0,82 0,79 0,76 0,73On perforatedtraysOn verticalperforatedtraysOn laddersupports,cleatsOn touchAt distanceOn touchAt distanceOn touchAt distance2 1,00 0,87 0,80 0,77 0,73 0,683 1,00 0,86 0,79 0,76 0,71 0,661 1,00 1,00 0,98 0,95 0,91 -2 1,00 0,99 0,96 0,92 0,87 -3 1,00 0,98 0,95 0,91 0,85 -1 1,00 0,88 0,82 0,78 0,73 0,722 1,00 0,88 0,81 0,76 0,71 0,701 1,00 0,91 0,89 0,88 0,87 -2 1,00 0,91 0,88 0,87 0,85 -1 1,00 0,87 0,82 0,80 0,79 0,782 1,00 0,86 0,80 0,78 0,76 0,733 1,00 0,85 0,79 0,76 0,73 0,701 1,00 1,00 1,00 1,00 1,00 -2 1,00 0,99 0,98 0,97 0,96 -3 1,00 0,98 0,97 0,96 0,93 -232The values in the table are given in accordance with IEC 60502 standard and the followingreferences apply to them:- the distance between the tray and wall is at least 20mm,- the distance between cables is equal to the cable diameter,- the distance between the ends of vertical perforated trays is at least 225mm,- the given values represent the average values for cable types and refer to the cross-sectionsof cables in accordance with the standard,- the factors are used for one layer of cables and cannot be applied when more layers arebeing laid.- the given values refer to the vertical distance between the trays 300mm; the coefficients arelower for shorter distance.