Voltage drop
Select the cable cross-section of the motor cable so the voltage drop is as small as possible. An excessively high voltage drop means that the full motor torque is not achieved.
You can determine the expected voltage drop using the following tables. For shorter cables, you can calculate the voltage drop by converting in proportion to the length.
Cable cross section | Load with I / A = | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
4 | 6 | 8 | 10 | 13 | 16 | 20 | 25 | 30 | 40 | 50 | 63 | 80 | 100 | 125 | 150 | |
Copper | Voltage drop Δ V / V with length = 100 m (328 ft) and ϑ = 70 °C | |||||||||||||||
1.5 mm2 | 5.3 | 8 | 10.6 | 13.3 | 17.3 | 21.3 | Load not permitted,
in accordance with VDE 0100 part 430. | Load not permitted,
in accordance with VDE 0100 part 430. | Load not permitted,
in accordance with VDE 0100 part 430. | Load not permitted,
in accordance with VDE 0100 part 430. | Load not permitted,
in accordance with VDE 0100 part 430. | Load not permitted,
in accordance with VDE 0100 part 430. | Load not permitted,
in accordance with VDE 0100 part 430. | Load not permitted,
in accordance with VDE 0100 part 430. | Load not permitted,
in accordance with VDE 0100 part 430. | Load not permitted,
in accordance with VDE 0100 part 430. |
2.5 mm2 | 3.2 | 4.8 | 6.4 | 8.1 | 10.4 | 12.8 | 16 | Load not permitted,
in accordance with VDE 0100 part 430. | Load not permitted,
in accordance with VDE 0100 part 430. | Load not permitted,
in accordance with VDE 0100 part 430. | Load not permitted,
in accordance with VDE 0100 part 430. | Load not permitted,
in accordance with VDE 0100 part 430. | Load not permitted,
in accordance with VDE 0100 part 430. | Load not permitted,
in accordance with VDE 0100 part 430. | Load not permitted,
in accordance with VDE 0100 part 430. | Load not permitted,
in accordance with VDE 0100 part 430. |
4 mm2 | 1.9 | 2.8 | 3.8 | 4.7 | 6.5 | 8.0 | 10 | 12.5 | Load not permitted,
in accordance with VDE 0100 part 430. | Load not permitted,
in accordance with VDE 0100 part 430. | Load not permitted,
in accordance with VDE 0100 part 430. | Load not permitted,
in accordance with VDE 0100 part 430. | Load not permitted,
in accordance with VDE 0100 part 430. | Load not permitted,
in accordance with VDE 0100 part 430. | Load not permitted,
in accordance with VDE 0100 part 430. | Load not permitted,
in accordance with VDE 0100 part 430. |
6 mm2 | 4.4 | 5.3 | 6.4 | 8.3 | 9.9 | Load not permitted,
in accordance with VDE 0100 part 430. | Load not permitted,
in accordance with VDE 0100 part 430. | Load not permitted,
in accordance with VDE 0100 part 430. | Load not permitted,
in accordance with VDE 0100 part 430. | Load not permitted,
in accordance with VDE 0100 part 430. | Load not permitted,
in accordance with VDE 0100 part 430. | Load not permitted,
in accordance with VDE 0100 part 430. | ||||
10 mm2 | 3.2 | 4.0 | 5.0 | 6.0 | 8.2 | 10.2 | Load not permitted,
in accordance with VDE 0100 part 430. | Load not permitted,
in accordance with VDE 0100 part 430. | Load not permitted,
in accordance with VDE 0100 part 430. | Load not permitted,
in accordance with VDE 0100 part 430. | Load not permitted,
in accordance with VDE 0100 part 430. | |||||
16 mm2 | 3.3 | 3.9 | 5.2 | 6.5 | 7.9 | 10.0 | Load not permitted,
in accordance with VDE 0100 part 430. | Load not permitted,
in accordance with VDE 0100 part 430. | Load not permitted,
in accordance with VDE 0100 part 430. | |||||||
25 mm2 | 2.5 | 3.3 | 4.1 | 5.1 | 6.4 | 8.0 | Load not permitted,
in accordance with VDE 0100 part 430. | Load not permitted,
in accordance with VDE 0100 part 430. | ||||||||
35 mm2 | 2.9 | 3.6 | 4.6 | 5.7 | 7.2 | 8.6 | ||||||||||
50 mm2 | 4.0 | 5.0 | 6.0 | |||||||||||||
Cable cross section | Load with I / A = | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
4 | 6 | 8 | 10 | 13 | 16 | 20 | 25 | 30 | 40 | 50 | 63 | 80 | 100 | 125 | 150 | |
Copper | Voltage drop Δ V / V with length = 100 m (328 ft) and ϑ = 70 °C | |||||||||||||||
AWG16 | 7.0 | 10.5 | More than 3%
voltage drop in relation to V line =
AC 460 V . | More than 3%
voltage drop in relation to V line =
AC 460 V . | More than 3%
voltage drop in relation to V line =
AC 460 V . | More than 3%
voltage drop in relation to V line =
AC 460 V . | More than 3%
voltage drop in relation to V line =
AC 460 V . | More than 3%
voltage drop in relation to V line =
AC 460 V . | More than 3%
voltage drop in relation to V line =
AC 460 V . | More than 3%
voltage drop in relation to V line =
AC 460 V . | More than 3%
voltage drop in relation to V line =
AC 460 V . | More than 3%
voltage drop in relation to V line =
AC 460 V . | More than 3%
voltage drop in relation to V line =
AC 460 V . | More than 3%
voltage drop in relation to V line =
AC 460 V . | More than 3%
voltage drop in relation to V line =
AC 460 V . | More than 3%
voltage drop in relation to V line =
AC 460 V . |
AWG14 | 4.2 | 6.3 | 8.4 | 10.5 | 13.6 | More than 3%
voltage drop in relation to V line =
AC 460 V . | More than 3%
voltage drop in relation to V line =
AC 460 V . | More than 3%
voltage drop in relation to V line =
AC 460 V . | More than 3%
voltage drop in relation to V line =
AC 460 V . | More than 3%
voltage drop in relation to V line =
AC 460 V . | More than 3%
voltage drop in relation to V line =
AC 460 V . | More than 3%
voltage drop in relation to V line =
AC 460 V . | More than 3%
voltage drop in relation to V line =
AC 460 V . | More than 3%
voltage drop in relation to V line =
AC 460 V . | More than 3%
voltage drop in relation to V line =
AC 460 V . | More than 3%
voltage drop in relation to V line =
AC 460 V . |
AWG12 | 2.6 | 3.9 | 5.2 | 6.4 | 8.4 | 10.3 | 12.9 | More than 3%
voltage drop in relation to V line =
AC 460 V . | More than 3%
voltage drop in relation to V line =
AC 460 V . | More than 3%
voltage drop in relation to V line =
AC 460 V . | More than 3%
voltage drop in relation to V line =
AC 460 V . | More than 3%
voltage drop in relation to V line =
AC 460 V . | More than 3%
voltage drop in relation to V line =
AC 460 V . | More than 3%
voltage drop in relation to V line =
AC 460 V . | More than 3%
voltage drop in relation to V line =
AC 460 V . | More than 3%
voltage drop in relation to V line =
AC 460 V . |
AWG10 | 5.6 | 6.9 | 8.7 | 10.8 | 13.0 | More than 3%
voltage drop in relation to V line =
AC 460 V . | More than 3%
voltage drop in relation to V line =
AC 460 V . | More than 3%
voltage drop in relation to V line =
AC 460 V . | More than 3%
voltage drop in relation to V line =
AC 460 V . | More than 3%
voltage drop in relation to V line =
AC 460 V . | More than 3%
voltage drop in relation to V line =
AC 460 V . | More than 3%
voltage drop in relation to V line =
AC 460 V . | ||||
AWG8 | 4.5 | 5.6 | 7.0 | 8.4 | 11.2 | More than 3%
voltage drop in relation to V line =
AC 460 V . | More than 3%
voltage drop in relation to V line =
AC 460 V . | More than 3%
voltage drop in relation to V line =
AC 460 V . | More than 3%
voltage drop in relation to V line =
AC 460 V . | More than 3%
voltage drop in relation to V line =
AC 460 V . | More than 3%
voltage drop in relation to V line =
AC 460 V . | |||||
AWG6 | 4.3 | 5.1 | 6.9 | 8.6 | 10.8 | 13.7 | More than 3%
voltage drop in relation to V line =
AC 460 V . | More than 3%
voltage drop in relation to V line =
AC 460 V . | More than 3%
voltage drop in relation to V line =
AC 460 V . | |||||||
AWG4 | 3.2 | 4.3 | 5.4 | 6.8 | 8.7 | 10.8 | 13.5 | More than 3%
voltage drop in relation to V line =
AC 460 V . | ||||||||
AWG3 | 2.6 | 3.4 | 4.3 | 5.1 | 6.9 | 8.6 | 10.7 | 12.8 | ||||||||
AWG2 | 3.4 | 4.2 | 5.4 | 6.8 | 8.5 | 10.2 | ||||||||||
AWG1 | 3.4 | 4.3 | 5.4 | 6.8 | 8.1 | |||||||||||
AWG1/0 | 2.6 | 3.4 | 4.3 | 5.4 | 6.8 | |||||||||||
AWG2/0 | 2.7 | 3.4 | 4.3 | 5.1 | ||||||||||||
