Factors for grouping in air multi core cables in three phase systems

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Table 12
Arrangement of Cables    Clearance = Cable diameter (d)Distance from wall > 2 cm   Cables touching each other and in contact with the wall
Number of systems side by side 1          2          3         6       9      1          2          3         6       9
Laying on the ground 0.95   0.90   0.88   0.85   0.84 0.95   0.90   0.88   0.85  0.84  
Number of Troughs
  1
Laying on Cables Troughs
(imheder air circulation)
2
  3
  6
0.95   0.90   0.88   0.85  0.84

0.90   0.85   0.83   0.81  0.80

0.88   0.83   0.81   0.79  0.78

0.86   0.81   0.79   0.77  0.76
0.90   0.84   0.80   0.75  0.73

0.95   0.80   0.76   0.71  0.69

0.95   0.78   0.74   0.70  0.68

0.95   0.76   0.72   0.68  0.66
Number of grills
  1
Laying on Cables Troughs
(unimpeded air circulation)
2
  3
  6
1.00   0.98   0.96   0.93  0.92

1.00  0.95   0.93   0.90  0.89

1.00  0.94   0.92   0.89  0.88

1.00  0.93   0.90   0.87  0.86
0.90   0.84   0.80   0.75  0.73

0.95   0.80   0.76   0.71  0.69

0.95   0.78   0.74   0.70  0.68

0.94  0.76   0.72   0.68  0.66
Number of system
above each other
 
Arranged on frame-works
or at wall
1          2          3         6        9

1.00   0.93   0.90   0.87   0.86



1          2          3         6      9

0.95   0.78   0.73  0.68   0.66
Arrangements for a
reduction is not necessary

Number of Cables arranged
above each other is arbitrary

Number of Cables arranged
above each other is arbitrary
 

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