0107 30 9
Notice Date Page
01201138
INSTRUCTION
HANDBOOK
9. Installation
The feeder cable sections mentioned in our literature are given only as a guide.
To obtain a value perfectly suited to your own application and which takes account of the differ-
ent correction factors in respect of your plant, refer to the tables below.
Table 1 (in accordance with EN Standard 60204-1)
Values given for :
- Cable with copper conductors
- Cable with PVC insulation (for other insulants see Table 3)
- Ambient temperature 40 °C max. (for others see Table 2)
- Three-phase cable under load without including starting currents
- BT / C/ E cable layout.
Maximum Admissible Current
Cable section Seated in Cable Duct Wall Cable
or Cable Trough Fixing Tray
B2 C E
3 x 1.5 mm² ................. 12.2 A .....................15.2 A .....................16.1 A
3 x 2.5 mm² ................. 16.5 A ......................21 A .........................22 A
3 x 4 mm² ....................23 A ........................28 A .........................30 A
3 x 6 mm² ....................29 A ........................36 A .........................37 A
3 x 10 mm² ...................40 A ........................ 50 A .........................52 A
3 x 16 mm² ...................53 A ........................66 A .........................70 A
3 x 25 m² .....................67 A ........................84 A .........................88 A
3 x 35 mm² ...................83 A .......................104 A .......................114 A
3 x 50 mm² ......................- ..........................123 A .......................123 A
3 x 70 mm² ......................- .......................... 155 A .......................155 A
Ambient Correction
Temperature Factor
30°C (86°F) ...................1.15
35°C (95°F) ...................1.08
40°C (104°F) ..................1.00
45°C (113°F) ..................0.91
50°C (122°F) ..................0.82
55°C (131°F) ..................0.71
60°C (140°F) ..................0.58
Table 2(correction factors for different ambient
temperatures)
Table 3(correction factors for different cable insulating materials)
Insulating Max. Working Correction
material Temperature range factor
PVC ...............................70°C (158°F) ............................ 1.00
Natural or Synthetic Rubber ...........60°C (140°F) ............................ 0.92
Silicone Rubber ....................120°C (248°F) ........................... 1.60