Notice
Date
Page
01201055
INSTRUCTION
HANDBOOK
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
different 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
9. Installation
0102
27
9