0308
10
7
Notice
Date Page
05102004
INSTALLATION
MANUAL
7. Installation
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
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
